Kenny,
To my knowledge, there are NO motels in St. Marks, but Tallahassee is only 20-30 minutes away. You could get one on the southeast side of Tallahassee and be closer than anywhere else you are gonna find.
Of course, Bobby & I only live about 1.5 hours from St. Marks, so if you need a place on your way in or out... you could always come here! (I think it'd be a little bit too much commute to get from here to St. Marks each early morning, but you are certainly welcome at our house!)
Susan
(Edited to change which direction you need to get a hotel... I'm a blonde and horrible with directions! )