Heyburn, ID. City Park. About 2 miles south of I-84. Very nice, FHU. Along the Snake River. $21.00 multiple days Good Sam or Old Farts. $22.00 otherwise. Rock Creek County Park, Twin Falls, ID. $15.00 a night water and electric. Dump station nearby. North Bingham County RV Park, Exit 108 I-15 Shelly, ID. $20.00 a night. Water and Electric, dump station in park. About 2 miles off I-15 and on the Snake River. There are several RV parks on US 20 going towards Yellowstone out of Idaho Falls, ID. Haven't stayed in any of those other than where we are now, Valley View RV Park, Island Park, ID.