The $60 for 3 years with Good Sam's isn't for the roadside assistance, that's for their membership plan that gives you discounts at Camping World and various Good Sam affiliated campsites. The Roadside assistance is a separate charge.
I've also been considering which provider to use, as our free year of Coachnet ran out back in July. Especially after hearing a horror story from my brother where he threw a bearing in the middle of nowhere and the only saving grace was that our uncle who was with him had CAA RV+.
In my case (and probably helpful to the OP) I've been looking at these options:
CAA RV+ ($144 Cdn)
Join CAA - CAA South Central Ontario
Coach-net Basic ($89 USD)
Coach-Net - Plans
Good-Sam RV Standard (79.95 USD)
Roadside Assistance Plans for RVs and Autos - Good Sam
I haven't started my in depth comparison yet so I don't know if these are apples to apples or apples to monkeys. I figure I've got about 4-5 months before the season starts so plenty of time to shop around.