You can at times have your wheels off the ground...it is not a big no no. but putting something under the wheels is a good idea. I've never blocked or choked my trailer.
If this is happening all of the time you may have to raise or lower your jacks.
it really gets down to money. do you have the money? we have always gotten the I/S on our trailers. And one thing to remember is that it does not add much value (if any) should you sell your trailer down the road.
You discover something new everyday. Bottomline, I'd suggest that before you purchase a bike rack for E bikes make sure it states 'rated for 5th wheel trailers' and the number of bikes you want to carry.
One of the above racks rated their E bike rack for 'trailers' but only one bike, not two...
There seems to be only 2 E Bike racks out there that say safe for 'E Bikes on 5th wheels'. Be aware, many say 'RV certified' but they don't include 5th wheels as RVs.
Swagman, Hollywood AND Quikrstuff do make 5th wheel E Bike racks. Quikrstuff states it is certified for a 5th wheel.
this isn't something I'm going to do but saw it and thought for those out there that want to do little things for a few hours without solar or a generator.
It looks like the tire brand and size has varied. I suspect it is whatever the company can install on that type of trialer so don't assume what is being said here is accurate.
if it is a non solar system just junk the RV dealers batteries and install 2 6 volt batteries. note: if you have a residential refrig read this article.
article: https://www.rvtravel.com/6-volt-or-12-volt-batteries-for-rv-which-is-better-rvdt-2110/