You can leave 2 NPCs in camp (until Act 2 when you get Halsin, I presume). I'm wondering if everyone is using them like I am.

Gale seems to work best as a Transmutation Wizard (so his Alchemy is better). He casts Longstrider on everyone, Darkvision on anyone who doesn't have it naturally, and Magic Weapon on some secondary weapons (at this point, it's really just things I might throw because everyone has a magic weapon). Then he hangs out in camp. That's his contribution to the advancement of our goals. I haven't tried Enlarge/Reduce yet, but I think that might be interesting to get into burrows or make my Barbarian bigger; he can maintain one Concentration spell while in camp, so that might be it sometimes, but Protection from Energy will be his usual Concentration Spell (though I neglected to have him learn it due to an oversight), which I'll likely swap for Stoneskin when he can cast 4th Level Spells.

Shadowheart can do Protection from Good and Evil at low level (but it requires Concentration, so I think it will generally be replaced with a higher level spell). Barkskin is interesting if you have a character who neglects their DEX and it makes a build for Wizard or Sorcerer that doesn't automatically make me think I need to bump DEX to 14 (and requires no Concentration), but my characters always have at least 16 AC, so I think it is of limited use. I generally only cast Protection from Poison from camp because it is a pretty lame spell, but it doesn't require Concentration, so it's a no-brainer to cast it on everyone until 2nd Level Spell Slots run out. She can do Magic Weapon like Gale, but he has fewer uses for his 2nd Level Spell Slots from camp. Enhance Ability is my usual choice for her Concentration Spell (over Protection from Good and Evil). She can cast Daylight without Concentration (though if you already have Darkvision on everyone, I don't know that it is particularly useful) and can replace Enhance Ability with Protection from Energy, which is probably better (even though I generally prefer to have Enhance Ability in place). When she can cast 4th Level Spells, she'll probably use all her 4th Level Spell Slots for Freedom of Movement; Stoneskin is a good contender but I'll still probably stick with Enhance Ability as her Concentration Spell.

I think Gale actually works better respecced as a Druid because he can do the Longstrider trick, then Goodberry with the remainder of his 1st Level Spell Slots. He can cast Darkvision and Protection from Poison until he runs out of Spell Slots, or Enhance Ability (Concentration) with one of them. His 3rd Level Spells could include Daylight and Protection from Energy, which is better than what a Wizard could do, though Daylight might be of limited value. And he gets Freedom of Movement and Stoneskin as 4th Level Spells.