Our TH (see sig...) originally had 2 queen beds in a bunk-bed configuration.... removed the upper bed (several hundred pounds). If it's just you and the wife, you could do this.
Generator is a must, either a portable, or installed, and it's gotta be big enough to run the A/C.
On board fuel station is really nice. At the end of the weekend, if you've got fuel left over, pour it in the truck for the trip home.
Cables to support the ramp as a deck is nice "round-to-it" project.
Exterior 110v outlets are very handy. My trailer does not have ANY exterior outlets. Pain in the xxx. My next project is to correct this design flaw.
Exterior flood lights (not just 1156 single bulbs) to work on the broke stuff at night.
Rubber matting to replace the carpet, so the oil and gas don't mess up the original carpet. We got rubber diamond plate matting from Costco.
The awning can go up or down in less than a minute, manually.