Hey spf50, not a whole lot of activities this time of year unless you’re into casinos (Biloxi area), but there’s always some great food that way! Spicy crawfish are a must try, I recommend Bozos if you find yourself towards the Alabama state line in Pascagoula, they also do a legendary poboy, but call ahead to ask about the crawfish, (crawfish season is kind of finicky). And the shed in ocean springs does good bbq.
Biloxi beach is kind of lackluster, but the drive along hwy90 is really nice and passes plenty of antebellum style homes. Oh and there’s a company that offers alligator tours outside of Pascagoula as well, but they can be kind of pricey, the real gem is this gas station near the tour site called oaks. They do a really good chili cheese dog (I know it sounds weird, but this place is legit. They stopped selling gas for like two years and just focused on hot dogs at one point, and the lines usually out the door).
If you pass through Mobile, Alabama be sure to check out Five Rivers, depending on the weather they offer kayak rentals and tours through the Mobile-Tensaw delta, which is this huge cypress swamp that packs more biodiversity than the everglades. There are also plenty of great bars with live music and seafood restaurants in downtown Mobile, (think little New Orleans).
Sorry for the exposition! But I’m sure you’ll have a good time, most people are pretty friendly and usually more than happy to give you tips about events and stuff if you strike up a conversation. Cheers!