If you are looking for an overnight RV campground between Amarillo and Abilene Texas, and you are thinking maybe you want to stop overnight before you get to Abilene, Sweetwater would be the place.  Here are two possibilities we spotted from the highway.  We have not stayed at either park but intend to try out one or both on future trips.  At milemarker #250 on the eastbound side of I-20 is a park called Rolling Plains RV Park.  They are at 9909 Interstate 20, Frontage Rd. Sweetwater, Texas.  325-235-8114  At the approximate same location but on the westbound side of I-20 is a park called Lone Star RV Park. 5730 N. Interstate 20, Sweetwater Texas  79556  Exit 249  325-235-1553   Both of these campgrounds are easily visible from I-20 and look like easy on and off I-20 for an overnight stay.