Last year Camping World did my oil change. I called to schedule this year's and they said they don't do them any more. If it was in for other service work they could do it but they don't schedule oil changes.
I used to get it done at the Ford garage for $68. Then CW for $189...now a truck center for $299. I guess if you spend 6 figures for a motorhome, they figure you can spend $300 for an oil change. Oh well...grin and bare it.