If you are low on one side, with dual axles, just putting one wheel on a ramp will lift the van up so no need to stuff around trying get 2 in position. Usually easier to pull van onto it while 2IC looks at level on drawbar and yells out, most times only on the ramp a small bit, when okay stand on brake while 2IC chucks a chock under it................
That reminds me, a couple of 50mm x 150 x 150 blocks of wood (real wood not MDF or chip crap) are very handy to have, can be used under stands, jockey wheel and even under a wheel to get things just right when a ramp is just too much trouble.........so about 6 is good number, they even double up as a jack pad, chopping block for kindling, fish, bunnies, roo...very versatile.
Another idea a short length of garden hose with fitting that will run from your draw bar tap to the rear of van, used for washing, filling water tanks, muddy people etc when connected to mains, also can transfer water from one tank to another for balance.