I'm no fan of AAA. I needed them twice and their batting average was zero. I have Coachnet and have used their services twice and was very happy with the quick response. Like Good Sam, they understands RVs.
But you asked about Good Sam and CW. The discounts are mostly bogus IMHO. Campgrounds give discounts for AAA and other organizations. CW prices everything so without their discount, you're just paying too much. Most of the small stuff can be purchased online, at Walmart or elsewhere at lower prices.
BUT, we joined a local Good Sam camping club within our first year owning a camper. See if your state chapter can refer you to a club in your area. You not only make great friends, but they've got a lot of hands-on help, advice and information to offer. Our group has about 15 rigs and camps five months plus the state camp out in season and meets monthly for lunch and meeting the rest of the long, cold Colorado winter. That alone is worth the small annual cost.
Happy camping and enjoy the new rig!