You (I) have Good Sam for roadside towing...and I truly hope that we never have to use the towing service. Beyond that, AAA, CoachNet, GoodSam (note alphabetical order) only send you a licensed (not necessarily qualified)service technician/mechanic. The charges are on you. When I had CoachNet they sent out a tech and told me the charge would be $50, the tech, who did a wonderful job by the way, said he never agreed to that, he usually gets $75/hr. He was great, got us back on the road and I gladly paid his rate and gave him lunch.
My point, if I need service I will find an appropriate truck/RV service center and hobble there, or call Good Sam and be towed to the service center. Unless I am sent a Truck/RV specialist I'll find my own service.
JMHO