Fixed camps are always going to be immersion breaking if there's considerable distance to cover on a map. DA:O was particulary bad - I mean it's ridiculus to think that the party is walking halfway across a kingdom to do a quest, then walking all the way back again to the same camp to sleep! They're spending more time travelling than there are hours in the day! That said, the map isn't so huge in BG3. Except for the underdark, we could have a temporary camp there rather than climb a mile long ladder twice each day!