Most of us deal with rain, sleet, mud/ snow, flooded beds and freeze thaw. I am in that category for much of the latter part the season. I don' start trapping until late Nov..- early Dec. many seasons.
Selecting better locations help with some drainage issues as you learn to do this with experience.
This is what I do when things go down hill as is with most seasons eventually. It works great for me.
Dig your trap bed a bit deeper and larger then normal for wet winter condition trapping. I use a good layer of salt for the first step of the bedding process using peat moss. Make sure it contacts the bottom and sides of the trap bed well enough to prevent any untreated set dirt from grabbing/touching any part of the trap.
Put a good layer of sifted dry peat into the dug trap bed. "Rub it generously into the trap bed sides also." Make sure it coats the bottom and sides of the trap bed and covers the salted area well. This doesn't take long once you have done it several times. This is your first step of peat moss bedding your trap well.
Now if have you dug your trap bed as near as you can to your selected trap size and depth you can now settle in your trap chain under your trap to somewhat wiggle and press bed your trap into the first layer of peat. Pressing, wiggling and compacting the trap with your hands and finger tips into the peat bed will be your first step in bedding securely.
The moist loose virgin dirt in the bed under the salt and peat layer will still conform somewhat to you working the trap into the bed. But it will provide a barrier of protection that can last for weeks when done properly. The surface cover is what is subject to giving you problems of your trap not firing.
Once that is done adequately cover the trap completely with another good amount of peat. Don't be cheap with your covering. After the second generous covering of peat over your trap find the pan by gently pushing the liberal peat covering away to allow you to know where the pan is located.
This will enable you to work the excess peat to pack it around and under the the jaws and pinch with your thumb and fore finger to pack under the levers as well. When you "layer bed" and coat the trap bed walls " as well" you can push or hammer in the top edge virgin ground soil around the jaws a bit to compact the top of the bed a bit if needed to tighten up things further.
Once you find the pan as a reference point this should let the average guy continue to bed the trap without firing it.
Some guys may need a bit more practice time then others..
This basic system can all be done fairly quickly with practice. Once you get on to it getting a good trap bed in peat will be much easier. I finish off the set with a dusting of waxed dirt most of the time but also use dried grass clippings from a local golf course. I get the cuttings from the greens. That stuff is 1/4 to 1/2" in length. Doesn't interfere with the trap functioning as does some longer clippings at times.
It is much easier showing this method then it is explaining it with words.