Did you try contacting Good Sam? Maybe they can give you some direction.
Try checking on RV Service Reviews, possibly you can find something on their site.
Don't limit yourself to just RV repair shops. Look for truck repair garages if it's a suspension issue.
Hopefully someone will give you better information and help.
If it is a front suspension issue, find a reputable front end, alignment, and suspension shop. Stay away from RV shops on something like this. An RV shop may foll around with it, or sub it out to an above mentioned shop. IMHO
When we blew a front seal on our Alfa, we use Emergency Roadside Service (recommended by a local RV dealer). They were quick and fair. I would use them again. Also, they have an ad in a brochure at Las Vegas RV Resort.