A good Sun Tent
Of course you need a tent, RV, hammock, truck bed or something to sleep in.
But more importantly you will need a tent type structure that will keep the sun off you during the day. It's not too big of a problem to keep the sun off, but you also need something that will stand up against the breeze/wind and keep the sun off. This is where it gets tricky.
I don't have any great tip to solve this problem, but I do know that shade is a key factor in your enjoyment of the weekend.
Good luck finding a good low cost solution.