Every tent platform north of VT had tiedowns. South of VT they usually didn’t, although there were some really nice PATC ones in southern PA that did. I used a Sierra Designs Clip Flashilight CD which is not freestanding and I never once had a problem with setting up the tent. You’ll almost always find big piles of rocks near the platforms if there isn’t a good way to tie down the tent. Bring some extra cord (parachute cord is the best!) and you’ll be fine.
You should seam-seal your tent even if it is waterproof. Our tent (which is great in the rain, BTW) didn’t leak until Shenandoah, and the leaks happened along the seams, so applying sealer along the seams solved the problem. Do it when the tent is new, because the sealer doesn’t work well in a dirty tent and it is a PITA to clean a grimy tent. Also, make sure that you use the stuff in a well-ventilated area and give your tent some time to air out; seam-sealer is truly nasty stuff.
Oreo