What to do with my hair at camp?

When I go to camp for 2 nights/days, I will have no access to showers. This shouldn't be a problem, but i have naturally curly, really easily-tangled-in-my-sleep, long hair. I usually take a shower every morning to detangle my hair. If I don't have access to showers, how will my hair survive? Does anyone know any techniques I could use to help prevent tangles in my sleep? Oh btw my camp is a surf camp :D