So much for people using this forum to obtain help for a problem. Three pages of responders and only two posts with any legitimate help suggestions! I take it those of you who flames the question have never had any kind of pest/ varmint problems in your RV's, all of the years you have owned and stored them! Yea for you!
To the individual who made this post and I do hope it was a legitimate issue, the best way to remove the problem is to trap the critter and either relocate it to a rural area, or permanently dispose of it. Shooing it away won't work. It has found a comfortable home, scented it, and it will return! You might also try contacting Pro Baass, or a local hunting supply company to see if they have any proven local solutions to your problem visitor.