Build ramps out of 2 X 6's. Cut one, 30" long, then one 22" long, and the final one about 14" long. Each of these is to have a bevel cut at about 45 degrees. Attach one on top the other, with good wood screws. On the top piece, which is about 14" long, put a bumper at the end with a short piece of 2 X 6, and do not put the bevel on it., so that when your tire comes in contact with it, you feel it. The others are to have the bevel turned so that your tire is going up a 45 degree incline, from one level to the next.
I carried 4 of these, so that I could put all 4 in back, one under under each tire, or alternately 2 in back on one side, and a 3rd on in front on the same side. If the front was low, then just two in front, under each tire. You have a lift choice of 1 5/8", 3 1/4" or almost 5 inches, depending how far you drive up on them. By your placement, you can rectify most locations. I used this approach for 16 years until I got a motorhome with jacks. Note, this does not act as stabilizers, but will level your rig out pretty simply. After the first few times, you will be able to eyeball it pretty closely. Note, these lengths were for 19.5 wheels and tires, if you have 16's you can go a little shorter. I think the 22's I have now would fit this length ok, I still use them for getting under my pickup.
2005 KSCA 3778 on 04 W22