Sounds like the consensus is 777 (2.5 to 3.5 hour drive depending on how much lead is in your foot, J-town and hubtown traffic, etc.). If you can't drive that far, for an 1 to 1.5 hours less, you can ride to a place in hubtown (just take I-59 to the US98/Hardy street exit and head west... been too long but it's somewhere between mile marker 55 and 65. There are 3 hattiesburg exits, this is the middle one as far as exit #'s go. There might be an A/B for different directions on the same street, but I call that 1 exit.
If you're cuming down to OS, Take I-59 S to US 49 S and then I think 67 is finished now??? If it ain't take 49 down to I-10 and head east (2nd ramp). If you've got a GPS update it and listen to it over me. No GPS, mapquest directions and print them.
--- I should put this as my quote ---
Memories.... where did my memories go?
---- but I won't...

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Have fun, stay safe. How many words did I mispell?