How to rig a rain tarp without trees -- poles, maybe??

We did this with our pop-up many, many times. Lots of poles and lots of rope. Lay the tarp out, catch one corner with a pole and anchor the rope to the ground. Go to the opposite corner and do the same. Then the other 2 corners. Then the middle. Once standing, raise each pole one at a time until you get to the height you want. Yes ... it's a lot of work. I'd never do it again!