Yeah that's what I've been doing in the 1st play through of mine, just me and Halsin. I never really was fully engrossed in Shadowheart or Astarion so I've never really tried anything with them past Act 1. Because of that I haven't had to deal with the really weird or creepy stuff.

I just know the ending from spoilers is going to hurt me and I wish my Tav and Halsin had more connecting moments via cut scenes/dialog. Maybe they'll add a patch with at least a more gratifying ending for Halsin and I can go back to my 1st play through happily smitten with my beefy boi druid lol.