What the above post have said with particular attention to the wheel bearings. I have seen more break downs due to that than any thing else. A spare tire in good repair of course and a jack that will fit and lift your trailer as well as a lug wrench that will fit your trailer lug nuts. Nothing you haven’t already thought of I’m sure. I just like to ramble on, must have picked it up from my wife. Have a safe and fun trip and let us know how you do.