The only quick, stop and stay hitched spot on Hwy 98 between Lucedale and Mobile would be the Semmes, AL Walmart. I know that is not the best option for most, but it sounds like you just need a quick stop and sleep. I see RV's and trucks there regularly, but I would ask before I did it to be sure. It is a safe place that has a paid security patrol service. The only other option would be the Escatawpa Hollow Campground at the AL/MS line, but I don't think you could stay hitched. I believe there are a few "pull-thru" spots here and there but most are back-in, and everything is smallish and tight. It is certainly a safe campground with the owners living on the property. Hope this helps. Good Luck.