JMHO: If you're that tight on clearance to the door, you'll probably be in trouble with the front bumper as the air suspension lowers.
The action of the suspension " kneeling " will move the coach body forward approx 4". The rear tires don't move but the geometry of the front suspension causes the forward movement as it airs down.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.