I think alot of it depends on how much you travel and camp. We have the "GoodSam discount/Camping world" discount membership but do not have the road side assistance through them. My AAA gold membership will cover any roadside repairs for the most part. True on the CG discounts but personally most of the CG we've stayed at in the last few years are non- Good Sam ones.
*Currently trailer-less but shopping
07' GMC Envoy w/ P2 controller (current TV)
88' Chevy K5 Blazer (soon-to-be TV)
74' VW Superbeetle (1303)