2 really cheap tents

[tent peg]

You can rig a tarp as a tent, but the tent has zips, groundsheet etc, a better shield from the elements really, just my view. I did the tarp route when I was a 'survivalist' over thirty years ago but tents lured me back.

I agree, a tent is often the best way, but not a Tesco special more often than not they don't even make it through music festivals...