Wal-marts and Cracker Barrels work great if you are pushing it to your destination and going to be driving late and leaving early. My experience has been there is usually enough parking lot available to find a level spot or a slanted spot if you need that to make you level without unhooking. Usually there are more than just me there and security is very present. Most RV's will also try to park so that they can put out at least one of their slides as most RV's barely function otherwise, but they try to put the slide side to the outside of the parking lot or other planter.
I prefer a campground if I'm at least getting off the road before sunset, then it just makes more sense as you will be relaxing, showering and replenishing, and obviously if I have the time to take my time to the destination then that is easier to do, but I'm not retired yet either and sometimes the destination is more important than the journey. Hopefully not to often though.
