I corresponded with Eric from NOMAMBO. Said he lives 5 miles from the Spillway trail and its been closed since May. Plus the website says its only a 5 or 6 mile trail.
You were right about Mississippi. Mt. Zion in Brookhaven MS. is about a two hour drive, with close to 10 miles of trail. Saucier MS is about 1.5 hours away, 20 miles of trail, but some sand and pretty flat.
Thanks again, I appreciate the help