Chatterbox Falls (Princess Louisa Inlet) is one of my favourite places also.. There is something "magical" about it (to me).
I don't know anything about the "Nimble Vagabond", but also would suggest the Ranger Tug (various sizes and models) or the Sea Dory. Both have large followings and from what I have heard, good reputations. There are various "other" brands like Sea Sport that are less trawler like, but are good overnight, sport fishing type boats that may be able to meet your wants and needs???
Anyway, good luck with your search and welcome aboard the forum.