Marion, AR is a decent stop just N of West Memphis on I-55 - no way I would willingly spend the night in West Memphis. There is a Fairfield Inn, Hampton Inn and Best Western Plus at the Hwy 64 exit off of I-55. There is a lot more in Southaven, MS though - quiet a few more food places, etc.
ETA: Jasper may be where the KOA is where I have stayed - just a few exits N of Marion off I-55.