Hi and welcome to the forum! Congrats on your new rig and upcoming adventures.
We travel with three dogs but don't have a travel trailer so I can't say first hand. However, I'm guessing the vast majority of our members don't have their dogs travel in the trailer. Many (like ours) have their own dedicated travel spots with us and that's a big part of the fun.
Best of luck.
Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.
2007 Itasca Ellipse 40FD