I can speak for the Costco that's in my town. Ordinarily, parking a rig overnight is not allowed; it's city ordinance that governs that. As for the fuel, sometimes it's cheaper than the other stations in town, sometimes it's not.

Until yesterday, when my husband blew me away with a gift of CostCo membership for the two of us, I had only family "acquaintance" with CostCo. (We were members of Price Club, but that was about 20 years ago.) My mom was a member for a long time. We were in Prince Rupert, BC, so we hit CostCo for groceries for their TT. Then, this past summer, we were traveling with our daughter, who currently has a CostCo membership. She helped us get fuel in Tempe AZ, which WAS cheaper than the local stations by about .05/gal. There, it would have meant about a 1/2 mile trip off the interstate for the fuel, which isn't bad, but I would NOT have wanted to be towing in that station!

When we had a 5W trailer, we always carried a book called The Next Exit. In there, it lists everything that's on the exit for all of the major interstates and most of the major "belt loops" as well. The ones that can handle longer RV's are marked in red ink, and THAT right there is valuable. For us, another helpful part of the guide was the (D) that told us that the station had Diesel fuel for cars and pickups, too. Grocery stores, Wal-Mart and Target type stores are also listed if they are within a mile of the exit. We carried the 2010 edition on our 2012 trip. It is now time for a new one -- the 2014 edition just came out.

So I will concur: if you want the CostCo membership for the groceries and other stuff you can buy there, go for it. But don't do it for the gas savings. Get a truck stop directory, or The Next Exit book. As a former 5W owner, I highly recommend them.


Donna