Before I answer I would recommend you check with your state's Game laws. My state of PA, and some others, do not allow a semi-auto handgun, like the 1911, to harvest ANY game or wild animal. So my 1911 MUST stay home.
I think the 1911 is a fine sidearm for protection from pests, but of the 2 legged kind. It has been protecting man from men for over 90 years and I hope it will continue. If this is the basis for your choice it is a fine one. If the Desert Warrior is truely designed with defeating desert dust conditions then it would do well on your camp trips. The Taurus, or a Sprinfield Armory GI model, would be inexpensive enough if it were dropped over the trail or gotten wet in a stream then no big finacial loss.
Now to answer your wildlife protection question. It is true that it very well could keep smaller pests, bobcats and snakes away from camp but I think it would fall short on your larger pests. As for a mountain lion up close and personal I think it would be underpowered and for a coyote it may lack the range and down range energy for any distance shot. If there is any possibility of black bears stopping by, then I think many would agree that the .45 ACP would be below other caliber choices. For these objectives I think a medium frame .357 Mag might be a better pick as you say you already have a .44 Mag. It would be just about the same weight as the 1911 but could be more energy versatile. Small critters could be taken out with .38 specials and the bigger stuff, including 2 legged varmints, could be done in by full house .357 magnums. One chamber could be loaded with a shot cartridge ready for a snake or small rodent to wander by.
The nice part of a mid frame revolver is there are many available 'used' for LOWER prices than a new 1911.
But as this post is in the 1911 forum lets highlight it. If you are concerned of harm from people and the smaller pests then the 1911 is a great bet. No reason why it couldn't work. But for bigger stuff I have doubts.
On a side note, I'm not a tree hugger but if you go out to the desert for the fun of private gun practice with your 1911, please don't forget to pick up as many spent cases as you can. When non-shooters come along to camp later and find your cases it makes the rest of us shooters look bad. We all have to do our part. A famous author once wrote that "Man, by his very presence, destroys the beauty he seeks in wilderness." Or something like that.
Plus I think we should all refuse to give Hillary, Diane Finestein, or Sara Brady anymore proverbial sticks to throw on any public relations bonfire at or feet.
Shoot well and carry a compass.