A couple of KOAs:
Gulf Shores/Pensacola West in Lillian, AL
(800) 562-3471
Milton/Gulf Pines in Milton, FL
(888) 562-4258
Some other RV Parks on or just off I-10:
I-10 Kampground @ Theodore, AL (near Mobile)
(800) 272-1263
Shady Acres Campground @ Mobile, AL
(251) 478-0013
Pensacola RV Park @ Pensacola, FL
(850) 944-1734
Rivers Edge RV Campground @ Holt, FL
(850) 537-2267
Indian Point RV Resort @ Gautier, MS
(866) 497-1011
Cajun RV Park, @ Biloxi, MS
877-225-8699
There are dozens more, these just were handy.
All have 14-50 outlets.