so it comes down to communication- whatever service your think you need, tell them you have a 9 foot tall, 22 ft long 8000 pound motorhome.
Tell them the year and model of the chassis ( which may be different that the model year of the motorhome).
There may a be a slight increase in difficulty for added electrical- but the chassis is about the same as they are used to looking at.
The dna is shared, there is just extra junk surrounding the van.
and they can tell you on the phone if they are or are not equipped to deal.
Mike
*** comment on the chain oil change shops as referenced below ***
some of these shops may not use recommended oils- check your manual
some of these shops may not swap your filter- mark yours with a sharpie and let them know
some of these shops may simply suction oil out through the dipstick tube- watch and make sure the drain and work is being done below the van.
I can change oil and filter on my chev laying on a mat in the driveway...no lift required- easy to reach in from driver's side. I spin on the new brand name filter and add the mobil 1.
old oil gets recycled.
syn oil is good for 5000 miles in most cases, avoid "planning" services while traveling- do PM at home before you leave