Not all of the local RV dealers are licensed state inspection locations. Look for a local Frieghtliner, Cat, or medium duty truck shop. They will either be or know a place to take the RV. When I bought my Monaco I lived in MD, I happen to find a place in Fredrick that did medium duty truck work and had no issue with the inspection. The nearest RV dealer was another 35 minutes north that could do it and they recommended them as easier to work with.
2006 Ford F350 6.0
2014 Primetime Sanibel 3600
Enough other vehicles to not bother listing.
Previous RV: 2001 Monaco Knight