We have been members of Coast to Coast, RPI, Western Horizons, Good Sam, Escapees, AOR, Thousand Trails, Freedom Resorts, Camp Club USA, Passport America and KOA Value Card. We have used the Coast to Coast a number of times and have almost always been disappointed in the condition of the parks. We use the Coast to Coast Good Neighbor parks more and those are okay. We use the Camp Club USA and Passport America the most when traveling. We stay at Thousand Trails parks more than anything and can stay there for from up to 28 days with our membership. Escapees has great benefits and you can use that membership for 15 % discounts too. The first group to join IMHO would be Good Sam, then the Passport America and Camp Club USA as they give you 50% discounts, although there are limits. The best value at the present time I think is the region membership now being offered by Thousand Trails. For $499 per year you get a regional membership and can stay at any of their parks for up to 14 days for free with a 7 day out then 14 days etc. Do good research prior to buying and you will be okay