You are being very thoughtful about it all, which couldn't be more important. I have thought of two more things. Have you thought about renting a trailer for a few days, to try things out and see what you like/don't like and need/don't need? Trust me, there will still be quite the learning curve once you have your own, but a rental of anything might help you some. Also, there are dealers who have hookups on their lots, where you can stay a night or two, get all the "bugs" out and everything fine tuned to your liking. It seems there are always some adjustments needing to be made, once you start using everything. These dealers are providing an invaluable service in preventing the frustration of little "issues" involving repeat trips back. Good luck, and pat your pooch on the head for we dog lovers.
)