We stayed in Lubbock at "Lubbock RV Park" 4811 North I-27, exit 9 (near the Lubbock airport). Kind of an OK but not great Park -- certainly adequate for an overnight stop. We were at the back of the park and it was quiet (off the highway) and there was very little air traffic from the airport, so no real bother there. Not a place for a long stay -- most certainly not a resort -- but decent enough for an overnight. I'd stay there again, if the timing occurred that way again. 50 amps, full hookup. ($23.40 w GS discount.)

On a different trip, we spent the night at a Walmart parking lot in Amarillo. It was a very windy night, rocking the coach most of the time -- so it wasn't very restful or pleasant. Freeway noise wasn't a problem because of the noise of the wind -- indeed, I couldn't hear the generator running when I was at the back of the coach in the bedroom due to the noise of the wind blowing. Did I say it was windy?

Amarillo has a Flying J on I-40 east of where US 87 crosses. It's a busy station -- we've filled there twice on different trips.

Stayed in Lamar, CO at Country Acres Motel and RV Park.  It was very dusty and the water faucet at the assigned spot didn't work (but I used a longer hose to the spigot in an adjacent spot). Nearly empty when we stayed there. They advertise cable TV, but the cable service had gone bankrupt (that says something about Lamar). Again, it was OK for the night. 50 Amp power, full hookup. Didn't match receipt to the location map/flyer, so don't recall what we paid. We arrived late and left early, so the lack of amenities wasn't an issue.

Didn't stop or stay at Dalhart -- have no recollection of the town at all, now.