To regrease the bearings you need to take the drums of.
But that is verry simple to do.
Why are electrick brakes not alowed??
The old smv trailors also have electrick brakes.
If you can borrow something like a chevy C20, dodge 2500 or ford F250.
You can bring her home in a safe way.
600 miles @ 35 mph is a real long drive.
I'm in the netherlands and we are now alowed to tow 90 kmh.
I do try to keep it below 100 kmh but on longer trips its more like 115 kmh.
But that is with a chevy C30 dually, weight distribution an brake controler.
My first airstream a 1973 27 ft overlander i towed with a 1957
with a good setup 100/110 kmh was no problem