I think it's a matter of looking at the benefits and seeing if they add up for you. I joined and I got the slight discount on the roadside assistance. I don't stay at RV parks (except 2 rallies per year), so have never gotten those discounts. I've been in CW stores maybe three times and only found one item I couldn't get cheaper at another chain retail store. That item was under $20. I don't care for the magazine subscription. Ended up not being worth it to me, so I let it lapse. I can honestly say I haven't noticed I don't have it because I never used it when I did have it.
So do your own math and decide based on your own style.