Short itinerary

Day 1: In Stockholm

Arrive Stockholm
Sightseeing in Stockholm
Opt: walking in Stockholm Ecopark/Djurgården
Opt: walking in Stockholm's Söder district with its charming alleys, spectacular viewpoints & historic houses
Accommodation: Stockholm
Meals included: None

Day 2: Tullgarn Palace → Trosa 

Transfer from Stockholm to Tullgarn Palace (transfer time 1 hr)
Visit Tullgarn Palace
Hike from Tullgarn Palace to Trosa along Sörmlandsleden
Hiking distance; Tullgarn → Trosa 12-19 km (easy-moderate)
Accommodation: Trosa
Meals included: Breakfast

Day 3: Trosa → Stendörren → Sävö → Sandvik → Trosa

Transfer Trosa to Stendörren nature reserve (transfer time 30 mins)
Hiking at Stendörren, visit islands, viewpoint and Naturum information centre
Boat from Stendörren to Sävö island
Hiking on Sävö island following Sörmlandsleden
Boat from Sävö island to Källvik
Hiking Källvik to Sandvik beach
Transfer Sandvik beach to Trosa
Hiking distance; Stendörren → Sävö → Sandvik 12 km (easy - moderate)
Accommodation: Trosa
Meals included: Breakfast
Boats included: Stendörren → Sävö 15 mins; Sävö → Trosa 20 mins 

Day 4: Trosa → Nynäshamn

Free day in Trosa
Boat from Trosa to Nynäshamn
Opt: walk Strandvägen in Nynäshamn
Hiking distance; no fixed distance
Accommodation: Nynäshamn
Meals included: Breakfast
Boats included: Trosa → Nynäshamn 3hr

Day 5: Nynäshamn → Häringe → Nynäshamn

Bus Nynäshamn → Häringe-Hammersta
Hiking at Häringe-Hammersta nature reserve
Bus Häringe-Hammersta → Nynäshamn
Walk Strandvägen in Nynäshamn
Hiking distance; flexible 10-15 kms (easy)
Accommodation: Nynäshamn
Meals included: Breakfast
Bus/train included: Nynäshamn → Häringe & return (40 mins each way)

Day 6: Nynäshamn → Nåttarö → Ålö → Utö

Boat from Nynäshamn to Nåttarö
Hiking on Nåttarö to Bötsudden viewpoint
Boat from Nåttarö to Ålö
Hiking on Ålö to Storsand beach
Transfer/cycle from Ålö to Utö, Gruvbryggan
Hiking distance; Nåttarö & Ålö 12 km (easy)
Accommodation: Utö
Meals included: Breakfast
Boats included: Nynäshamn → Nåttarö 20 min & Nåttarö → Ålö 30 min

Day 7: Utö → Fjärdlång → Stockholm

Hiking on Utö to northern end of island
Boat from Utö Gruvbryggan to Fjärdlång
Hiking on Fjärdlång to Tysta Klint and return
Boat from Fjärdlång to Stockholm
Hiking distance; Utö/Fjärdlång 10 km (easy)
Accommodation: Stockholm
Meals included: Breakfast
Boats included: Utö → Fjärdlång 30 mins; Fjärdlång → Stockholm 3¼ hr

Day 8: In Stockholm

Sightseeing in Stockholm
Opt: walking in Stockholm Ecopark/Djurgården
Opt: walking in Stockholm's Söder district with its charming alleys, spectacular viewpoints & historic houses
Depart Stockholm
Meals included: Breakfast