Being from Oregon, we can get away with less of a shelter.
But I still do find that a full enclosed shelter that keeps out the skeeters and ants is worth it.
Nothing worse than throwing down for a mid day nap only to be bugged to death.
Depending on how/where you hunt & recreate, a standup pole tent can make setup on hard ground (read as unstakable) at least possible.
It should be a 2person tent, simply to have room for gear. Double doors are nice as well, but do add a few extra ounces.
Like Luke said, many times you can nix the fly, other times you can use the fly only as a tarp.
Other times you can simply roll with a bivy sack, This is my summer method. (add a fly tarp JIC)
Ideally the shelter you choose can morphe w/ conditions and be setup multiple ways.
OR.... you should plan to use a couple shelters.
I tend to use several ranging from: a Beckel TT tent for base at truck or packing in w/ the mules, a couple cheap 2person "Biker Tents" that I use as spike camp tents, to a simple fly tarp & bivy bag for summer use.
Currently I'm looking at adding something UL along the lines of the Kifaru Mega tarp or perhaps the Tarptent Squall II or Dbl Rainbow w/ their full nest. Leaning toward the Rainbow.
Also toying w/ the hammock concept.
Hunt'nFish