Hi Richard, welcome to permies! Congratulations, you must be pretty excited!
What sort of trailer did you get? I'll be living out of a tiny little 1975 ~14ft fibreglass 'Carefree' trailer this summer.
A couple thoughts:
The observation and planning stage sometimes doesn't get enough attention; layout and positioning of zones, plants, access, infrastructure, etc... all important stuff! Saving even 1 minute on something that you need to do/access twice a day will add up to 12 hours a year; 12 hours a year for 50 years is nearly a month!
Is this a first step on land you plan to build a permanent home on, later? Or will you be looking elsewhere when the time comes for the next step? If this is a temporary location, think about what you'll be able to take with you when you; aside from experience and portable creatures/equipment, a source of trees/plants that you can propagate from can really be a leg up. If permanent, ASAP is always a good time to plant slow to mature things like nut trees.
Travel trailers can get pretty cold in winter; if you'll be there then, you might want to think about auxiliary heat, maybe check out
Paul's electric microheat article. If your trailer is on the larger side, you could also look into adding a woodstove, though I've seen some *incredibly* unsafe woodstove installs in travel trailers... If it/you won't be shifting anytime soon, you could build a small addition to accommodate such a woodstove.