Like any membership it is worth it if you want/need/use their services. Escapees actually owns and operates 9 RV parks. They are reasonably priced and are now available to non-members if you want to check them out. They also have 11 associated coop parks owned and operated by the lease holders which Escapees members can also stay at. You can see reviews of their parks on RV Park Reviews.
Escapees has a discount park program that gives 15% to 50% off nightly stay rates. In my experience almost all of the parks in the Escapees system are also Good Sam parks and the 50% discount parks are Passport America Parks and the restrictions on the discount are the same. Membership includes the magazine, which is a good one. The Escapees mail forwarding service has a good reputation. You must be a member to use it. There is also the CARE center, located in Livingston, TX which provides assistance for members that need it for their daily activities. With the Good Sam Discount, membership is $35 for the first year instead of $70.
Safe travels!
Trailertraveler