You have received some very good advise. I also suggest you spend a couple days in the new trailer ASAP, use everything to insure they all work. When we bought our new BH last Dec. we went straight to an RV park and spent a few days living in it, you would be surprised with some of the little things that we found. They were the kind of things that if you were on a trip or vacation would really upset you and take the joy out of what should be a good time. These were not serious things just irritating things. We took it back to the dealer and they made all the repairs/adjustments and we were back on the road later the same day. It will also help you determine what kind of support you can expect from this dealer in the future.
Ow, one more thing. Since you are new to Rving, both of you need to pay close attention as to how to open and close the awning, this if it is a manual and I suspect it will be. I know it sounds dumb, but you can't believe how many times I have had new first time owners approach me in campgrounds asking if I know how to open thier awning.
Good Luck and Happy camping