I need to spend tomorrow night away from home. Just in the woods, away from anyone else. The problem is I don't have a tent or any camping equipment. I'm in decent shape, and I can spend some money (~50 USD) on supplies. I don't think that can buy me a tent but I'm pretty handy and I was hoping someone here could advise me on how to spend a few bucks on equipment to build a simple lean to or something to shack up in for a night. I'll be driving to a large national forest a few hours from home. The lows at night this weekend are around 50* F and there might be some rain.

tl;dr - going to spend one night in a forest, don't have a tent and have never done camping without one. Please advise.