In my latest playthrough, the camp scenes were more spread out but I did eventually get more of them. (For only 2 companions though... and I left Shadowheart on the beach/at the grove until she ninja-invited herself at the Shattered Sanctum bridge scene; otherwise she still got priority exclamation-mark dialogue - and the extra approval/disapproval... I thought they were supposed to change that)
In previous patches I could get Raphael + bite or Raphael + dream.
In patch 8 I got one event max per night. I finally got Gale's artifact dialogue on long rest 11, the longest LR count, and Astarion's bite scene two long rests after the sickness scene, again the longest LR count. Surprisingly, I got one of Lae'zel's camp dialogues when I accidentally clicked her in the wilderness near Scratch... I don't know if that was a bug or if they are implementing companion dialogue/scenes outside of camp.
I also haven't tested whether this was related to camp location, relationship level, quest progress, or even some combination of the three. Might be worth investigating (but I'll probably do it closer to release when that info might help the first full run).
