[Swifty Willownall]

Quest name: Welcome to the jungle
Location get: Inside the Sailor's coin inn
Quest range: 2-4, party 1
What: I joined a party after they had taken the quest, and by staying in the party as they went through the quest and completed it, I got the exp turn in and journal update, albeit the exp turn in was small because I was level 9.

Edit: This seems to work for multiple quests.