First, let me say I'm not a fan of camp supplies, one reason is it's tedious to ration and plan every use and the second is that the in-game economy is not self-sustaining everything is scripted which is nice but doesn't sustain itself forever given that the shop keepers inventory resets after a log rest, which is nice, meaning there is always stuff to buy and not always going to be stuff to sell, personally I just steal items and money to circumvent this.
But here's my request:
1. NPCs need more openings for stuff like poison, if we have a necessary resource to rest they should get a variability in their supplies as well
2. Night events, where we can do things under the cover of night in the world since its basically day indefinitely if we don't go to camp
3. Falsify items to trick NPCs into thinking you have completed a quest or so you can keep an item or even replicate an item to use, but learning it should probably need a recipe or time to analyze the item
4. Request things like custom items or weapons that take time to craft from NPCs or people at camp, and not just one day or long rest a full day-night cycle with long rests equal one full day or just waiting or doing quests while its being done
that's about it 1 & 2 are a must but the others are a bit unreasonable to expect given it may be game-breaking or tedious.
