Two years ago we got infested with them up in MN. We "killed" at least 50 a day. We had so many that we got out the vacuum hose connected to the central vacuum system with a long extension, and just left it out for when we saw more of them. We'd go from one end of the MH to the other thinking we had all of them. A couple of hours later there were more.
We never did get rid of all of them until we put the DP into storage. Between the heat and then the freezing, there weren't any of them left alive in the spring.
Bill
Nodwell RN110 out moose hunting. 4-53 Detroit, Clark 5 spd, 40" wide tracks, 10:00x20 tires, 16,000# capacity, 22,000# weight. You know the mud is getting deep when it's coming in the doors.