Frank Jackson State Park is 1:36 hours (78 miles) to Destin per google maps. Stayed there once several years ago on our way south. Pulled in real late at night and left real early in the morning, so we have not much to report other than it was tight and crowded. But as memory serves me it was late Friday evening and all the regulars have already staked out their sites awaiting the weekend. Pretty much easy in and out, especially when the beach is you objective. Best I can do.
Our 2351D Phoenix Cruiser, Jack, has turned us from campers into RVers and loving it!