The last time I got tires it was for my Beaver and I was a member of the Beaver/Monaco club within FMCA. The better deal on tires paid my Beaver/Monaco dues for 3 or 4 years and the support from club members on maintenance was beyond amazing. The FMCA discount on the tires paid for my FMCA dues and roadside assistance fees.
I see that you have a Newmar.......I don't know if FMCA has a Newmar club but if they do maybe a word to an exec member could get them to investigate getting the Beaver/Monaco deal, too. Or maybe FMCA could get the Beaver/Monaco deal for all FMCA members.