I have all but quit digging dirtholes. Every time I dig one, I say I will never dig another dirt hole again. The amount of rain we get is everything but dirthole friendly. I have went to almost exclusively pipes and flat sets. I have been using an M44 bait that John Houben made for a government job lately, and it has been working very well for me. Sometimes, I will use a mouse based food Lure, or both. I have been using a piece of bamboo for the pipe because I can just leave it in the ground when I pull my line. No stinky pipes to haul back home or carry out of the woods. I’m not sure what kind of catch percentage I have compared to dirtholes because I don’t dig them anymore, but I can tell you, the only time I know that I have missed anything on a pipe is after a freezing rain turns to snow, and the ones that don’t have something waiting on me have tracks all over the set. You can tell they are spending time there trying to get what’s in the pipe. I’ve had them dig under 6” or better of snow to get down to the pipes. One thing that helps is to drill a hole in the pipe that will be above ground. I don’t do this for drainage. I started doing it after somebody showed me the difference in the way the smell travels with and without the hole. Pound one with a hole and one without a hole and drop a cigarette butt in both of them and watch how the smoke travels out of both of them and you will see what I mean.