So slow and easy sounds good - but I think the trailer is well protected underneath and I'm not convinced that the tow vehicle will kick back too much gravel.
Just me-but I've travelled many miles on gravel roads. And washboard/gravel are the worst. But I lock the truck in 4WD and do about 50mph. Road permitting, that is. That speed seems to let the truck and trailer "skip" across the top of the washboard surface.
Now-probably kicked a few rocks up and "pinged" on the trailer but it is what it is.
Opinions/Experience vary, but that's how I head down gravel roads.
2012 FunFinder X 210UDS
4-68 watt flexible panels; 1-215 glass panel/4 Battle Born LiFePO4 Deep Cycle Batteries
2014 Ford F350 6.7 Liter PowerStroke V-8 Diesel longbed, SRW