Zach;
The advise you have been given above from those two old coots is good advice to be sure!
I used to make a lot of sets early and don't put the trap, lure, bait, or urine in until the day I actually trap. I would dig the trap bed and go through the motions of making the set complete. Sometimes I would get a surprise when I went back to put in the actual set only to find that an animal had made a visit with track and urine at the location. Just made it easier and if he/she peed, more inviting to the next one. Then it was quick and easy to bed the trap when I was ready.