camp.ar
Rest area in Arkansas just off of I-40E. Public restrooms. Good cell service. A decent places to spend the night for free when driving cross country. Felt safe and relatively quiet at night. Plenty of room. Parking spaces were numerous but weirdly short.

camp.tn
A KOA campground in Tennessee, a short drive from I-81 near the Virginia border. A comfortable fee campground with hook-ups and amenities if you are looking for a safe and pleasing place to spend the night during the road trip. Friendly staff. Good cell service in a rural area not far from food and gas. Busy during peak season. Enough room for one or two vehicles per site.