Gamla Stan and the medieval core (park once, walk everywhere)
Stockholm is strung across 14 islands where Lake Mälaren empties into the Baltic, and the sights you came for sit packed onto two or three of them, so the sane way to do it in a campervan is to park once and move on foot and by ferry. The handiest full-service base is Bredäng Camping on the Mälaren shore, about 10 km southwest of the centre, with paved 80 m² motorhome pitches, a service and disposal station, and beds from roughly €38–45 a night. The metro is a 700 m walk through the trees (blue line 13 toward Norsborg, 15–19 minutes to T-Centralen), and a two-minute walk the other way drops you at Mälarhöjdsbadet, a sandy lake beach for a swim after dinner.
From T-Centralen it is a short walk into Gamla Stan, the 13th-century original town spread over Stadsholmen and the islets of Riddarholmen, Helgeandsholmen and Strömsborg, all ochre, mustard and rust-red merchant houses from the 1600s and 1700s wrapped around cobbled lanes. Start on Stortorget, the oldest square in the city, ringed by stepped gabled facades; walk over to Kungliga Slottet, the Baroque Royal Palace, which at 600-plus rooms is one of the largest in Europe and still the King's official residence, with Storkyrkan cathedral right beside it. Squeeze through Mårten Trotzigs Gränd while you are there, the narrowest lane in town, tapering to about 90 cm across its 37 worn steps.
Djurgården, the museum island
Djurgården is the green island where most of the city's big-hitter museums cluster, and it goes largely car-free in high season: from 30 April to 27 September 2026 the main approach bridge, Djurgårdsbron, is closed to private cars on weekends and public holidays between 10:00 and 17:00. Leave the van back in Östermalm or Gärdet (roughly 1,400 spaces within walking distance) and come in on foot, by tram (T-Centralen to the Gröna Lund stop, about 13 minutes) or on the line 82 ferry from Slussen, around 10 minutes across the water.
The headline act is the Vasa Museum, built around the only near-intact 17th-century ship left on earth: a 64-gun warship that heeled over and sank barely 1,300 m into her maiden voyage on 10 August 1628, when a gust caught her sails and water flooded the open lower gunports. She lay in the brackish, low-oxygen Baltic for 333 years before her salvage in 1961, came up some 95% original, and now towers over you, hull about 61 m long and the stern castle rising 19.3 m, every surface crawling with carved figures. Adult entry runs SEK 195 in low season and SEK 240 from May to September; September to May it opens daily 10:00–17:00, Wednesdays to 20:00. Within an easy stroll you also have ABBA The Museum (adult tickets around SEK 249–329 depending on the date, under-7s free), Skansen, the world's oldest open-air museum, founded in 1891, where in 2026 children up to 15 enter free on a pre-booked ticket, the waterfront Gröna Lund fairground (entry from about SEK 130, free for under-3s and over-65s), and the cathedral-like Nordiska museet.
The archipelago by kayak
The Stockholm archipelago scatters east of the city across some 30,000 islands, islets and bare skerries, and the way to feel it rather than just look at it is from a kayak rather than a ferry rail. A guided full day with an outfit like Stockholm Adventures is about eight hours at SEK 1,690 per adult (16 and over) and folds in the minivan transfer, double kayaks and gear, a guide, a lunch cooked on the rocks and an afternoon fika; you meet at Kungsbro Strand, five minutes from Central Station, pull in on islands to swim, and stand a fair chance of seeing seals, sea eagles and deer. Groups usually top out around eight, so it stays quiet.
Rather set your own pace from camp? Self-paddling costs a fraction of that, roughly SEK 300 for two hours in a single and SEK 400 in a double. Kanotcenter in Vaxholm, about 30 minutes out with a launch on Resarö, is the obvious place to start, while True Nature Sweden and Kajak & Uteliv work the emptier northern stretches around Furusund and Gräddö.
Drottningholm and the day trips: Sigtuna, Birka, Vaxholm
The best half-day off the island is Drottningholm Palace, a UNESCO World Heritage Site on Lovön in Lake Mälaren and still the royal family's private home (they keep the south wing). People call it Sweden's Versailles, and not idly: the Baroque parterres, the 1760s Court Theatre with its original stage machinery and the Chinese Pavilion (Kina slott, ticketed separately) all survive intact. Entry is SEK 170 adults, SEK 150 students, SEK 85 for ages 7–17, free under 7; open daily 10:00–17:00 May to September and weekends 10:00–16:00 October to April. Skip the wheel altogether and take Strömma's boat from Klara Mälarstrand, beside City Hall, about 50 minutes each way, running mid-April to late October.
Three more outings are worth the water or a short hop. Sigtuna, founded around AD 980 and reckoned Sweden's oldest town, sits about 40 km north on the lake; its medieval high street, Stora Gatan, still traces its thousand-year-old line (you walk roughly 3 m above the original surface) past low wooden 18th-century houses, in the middle of the densest cluster of runestones anywhere, around 170 across the municipality and some 30 in the old town itself. Birka, a UNESCO site on Björkö, was a Viking trading hub from about AD 750 and is generally reckoned Sweden's oldest town too; Strömma boats from Klara Mälarstrand (about two hours each way, May to September) bundle the crossing with the museum, a walk over the grave fields and a reconstructed Viking village. And Vaxholm, the archipelago's gateway town some 17 km out, is an easy Waxholmsbolaget ferry from Strömkajen by the Grand Hotel, about an hour; its landmark is the island Vaxholm Fortress, raised by Gustav Vasa in 1548 to bar the sea route to the city and now a museum, reached by a short shuttle boat.
