Welcome to iRV2. and the Newmar family.
On certain leveling systems in the PAST an owner could move the coach while continually holding the suspension dump button on the leveling panel ..
Something I would be more that reluctant to try!
However this is a dangerous on three or four counts ,
One, the sudden rise in height , of which you're already aware .
Two , the drive shaft angle ; binding U joints ; possible drive train damage .
Three, low air pressure, from the continual dump, resulting in automatic park brake activation , stopping you in the most awkward place you could possibly imagine.
Four , interference between body work and tire if the entry requires any turning of the wheels.
JMHO: Start phoning for estimates on raising the entry door height.