I have done TA and Flying J, I just parked away from the trucks. At the ones I frequent there is a separate lot for RVs, it is away from the trucks. The only thing they asked is if it is for more than one night not to use the RV space, they said they like to keep them open during the day for travelers to park and go. Usually Im just passing through so that's not a problem. Both of them had the RV spots out front so safety wasn't an issue (also sam colt is a good friend of mine when it comes to truck/rest stop safety) and it wasn't as noisy. I would do either again, and in fact I will be here is 2 weeks when I trek to Colorado.
Walmarts are also good. What are your reservation in doing so? Or just curious?
2015 Forest River EVO 2850
2012 Dodge Ram 2500 6.7 Cummins
Yamaha 2k x 2 with parallel cable
EMS 30 PI portable w/ Edison plug
Nights Camped (2016-13) (2015-13)