I ordered 2 boxes (8 pouches) of Cab Fresh this morning. I figure 2 in the RV, one in the wagon, and the balance in my shed and garage. I'll report back with results!
As an aside, I was seeing deer ticks really early in the season (March). Turns out that mice carry the ticks and spread them to other animals. I bought some "tick tubes" which are basically toilet paper rolls stuffed with cotton that has a poison on it. Animals aren't affected by it, but it kills ticks. Mice grab the cotton from the tubes, make nests with it and get the poison on their fur. Ticks die when they come in contact with the mice. I've found a couple of nests on the property made out of those cotton balls and I have not seen a single deer tick since March.