It's been so long since I played Kingmaker I really don't remember the camping system, so I can't say. Question for you both...are you still playing BG3?
After close to 500 hours and finishing the game 4 times, I have moved on. I might return if Larian does something to add new content but as the game stands now I have played it enough I can cheese through it easily even in Honor Mode. For my CRPG needs right now I am doing Kingmaker, with WotR, Solasta, Witchstone and Rogue Trader all waiting in the wings. I am also playing Enshrouded for my coop gaming itch.
As for the camping in Kingmaker, it is a bit more complex but also makes more sense. Each character in the party has a role fore the camp. Either hunting food, standing guard, concealing the camp or being the cook for the night. This creates a small feel of an extra dimension to the characters. The cook can try special recipes that can give the party buffs for the next day. Also a camp could be randomly raided during the night, this depends on your guards and ability to conceal the camp. Camping in a Dungeon is VERY different as there is no ability to "hunt" or to cook, so you carry rations specifically for such camping needs only.
Further camping is not a simple, lets do it to get our spells thing. Camping is sometimes required as passage of time is real in Kingmaker. Your party members become fatigued and you need to camp as not doing so has detrimental effects. Further the camping itself takes time and this plays into the fact that many quests and events are time limited based on the game world's calendar.
Compared to BG3 this is a ROBUST and deep camping system. Also in Kingmaker, camping will not allow you to switch companions, for that you need to be a safe location like a city.