BRCC sounds like a great idea. As pointed out, the self reliance thing may be the problem. If you say you will offer water (while supplies last), you will end up with a lot of people demanding the water you "promised" even after you run out. If you promote that you will offer bike locks, then participants will depend on you for them and not buy one prior to attending. You will have people lined up at your "Customer Service Counter" demanding to see the "manager" to complain if you run our of anything. (the Walmart mentality)
It's admiral that you are offing up some good services, but once you get people to expect, depend and rely on you, you will only have a week of headaches. The same goes for pre-selling anything. While not allowed, it would only make people rely on YOU, and not THEMSELVES.
Your easy solution, is to offer up all of the playa services that you mention---water, cups, recharging, locker loaning and supply exchange, but don't allow people to become dependent on your generous offers. Just have them there without promoting it.
Another problem might be getting placed right by Center Camp. Placement is always the luck of the draw, and you may not be successful. Plan on being able to offer up your services, even if you're a few streets back.
Gook luck with your theme camp, I hope it all comes together for you.