Sounds like we have about the same gear except the sleeping bags, mine is a 20 degree, thus the fleece liner;I hope it adds some warmth. The 20 degree bag might be enough on its own, I have never used it at very low temps.
I've been lucky enough to get the same camp site each time at trail camp and staking the tent is no problem. You might not be able to everywhere but there are places you can, if not there are plenty of rocks to tie off to!
