We have been to sites where we have ,had to lift the van by maybe 8 inches on the side and Have upto 12 inches under fully extended stays. Rural sites.
Just taken out small Yellow Ramp from the Caravan , leaving the Huge Millenco Quatro, in the van. But after posting about levelling, realise why we had both. The yellow one has a lower profile for going infront of the Motor mover. .
Heah, its all about getting the water out of the shower or sink.
Wait until winter when your waste pipes freeze up if you don't put salt or anti freeze down your shower drain. All our pipes are lagged so no problems.