We have good sam and used the assistance 1 time about 2 years ago. Engine would not start in campground after arrival so called GS about roadside assistance. They said since it was late at ight they wwould work on it and call me in AM. They did, They also found a place willing to send a tech to diagnose the problem and a potential repair shop. This was on a sunday 4 july weekend. Anyhow once we got approval for the repair place (an independent truck garage), they coordinated the pickup and delivery of the RV. Got it to the place and the guy let us stay in the unit while they worked on it.
So thats my experience with GS roadside and Ext service. Also take into consideration that the rv is a 14-15K weight and smaller services are not equipped to handle that weight in all areas. Guy that hooked me up had a nedium duty truck with the hydraulic lift for the front to work with, a lot of tow 'service' are set up with 1 tons with lifts for cars/trucks without a high weight.