I did not go through Costco but have bought 2 cars through the AAA program The dealer also had the Cosco program and a Internet program. The way it worked was you contacted the AAA and they told me who the dealer was and the salesmans name to contact. you then called the salesman with the programmed and made an appointment, picked out the vehicle you wanted and he gave me the price, No haggle, take it or leave it. It was about a $3000 savings which was fine with me. Signed the papers and drove home with a new Honda Accord. The thing with this program is no haggling so do your homework and decide what price you are willing to accept. Don't know how the RV program works but the car program is great as far as I am concerned., I don't like the haggle part of buying.