Depending on your direction of travel (east or west), if yer just lookin' for a nice, peaceful place to 'overnight', 'bout 60mi east of Amarillo is Lake McClellan Recreation Area, part of the McClellan Creek National Grasslands, administered by NFS. NO shopping/grocery facilities nearby but campsites are nice, level graveled areas with tables'n grates, 17 sites w/elect, & nice, clean toilet/showers (individual/family type) especially in the loop at west end of the park. The west loop is surrounded by lots of nice mature trees near the small lake. Apparently a fire several years ago nearly decimated the park but it has been 're-habbed' with little evidence of the fire except for some old 'downed' tree carcasses in the area. We've spent a night there a couple of times when we couldn't 'make' our destination further east or west & have thoroughly enjoyed it. Once was in June & the last time in July. The weather was nice & we enjoyed the shade & the local wildlife (deer, rabbits, etc.). We've since decided that'll be our overnight stop when going to visit Lenora's family in Arizona. Just take FM2477 north off I-40 & it's a couple of miles to the c/g. If ya hafta get supplies before stopping, best places are McLean 'bout 20mi east or Groom, a dozen miles west on I-40.
Our campsite in July 2010 on our way home from Cloudcroft gathering