Hmm... This is a legitimately interesting idea. Assuming that you are able to keep all party members with you throughout the game for whatever reason, this could give you an incentive to keep reviewing all of their stats and gear. It would be assumed that any ambushes at the camp would result in all party members joining the fray at once, instead of being merely limited to the standard four.
This could also result in a sort of base defense mechanic where you'd move different people to different parts of the camp based on their tactical strengths (or how fast they can dash over to surprised party members to wake them up if they are caught sleeping). Certain party members could put countermeasures in place around the camp against ambushes, like Astarion setting up traps, Shadowheart warding sections of the camp against specific enemy types while providing the party bonuses, and so on. Your lead character could confer other bonuses based on the class they started out as (and I word it this way due to an assumed ability to multiclass later). You could even give the dog some armor and train him to bark in order to alert the nearest party members at the first sign of trouble (and a Druid or Ranger MC could probably find some way to make the dog combat-ready as one of their unique class features too).
Oh I'd love big battles at the camp using every party member, I love being able to recruit in games and having a large group of competent adventurers seems like a good way to reward us for navigating their issues and keeping them from killing each other and getting to see the full group in action is satisfying. I liked being able to use the Iron Flask in camp even though he targets Scratch first... So random encounters would be more fun.
