Another thing you could do is when parked at home. Go out with her daily and spend a couple of hours in the trailer doing normal hh things. Watch tv, bake something, clean something, etc. As she gets more used to spending time in the trailer she should be fine. Also, having her bed, blankets, toys, chew bone or whatever in the trailer when you are there should help her think of it as her home also. Make it smell like home by spending time in there. Do you do things different? Do you use air freshners that you don't use in your house making it smell different? Think about those type of things too.