LA pepper sauce seems like something a ‘cooks southern’ guy would use. The other things sound like cocktail items.
I think your son is telling you his FIL likes to cook with a southern style. Go with sauces and spices to help him get the flavors he wants. Get the ingredients to make jambalaya.
Yes to pickled watermelon rind! It’s one of my all time favorites. Pickled okra would be good too. When we were living in NJ and I was missing Southern food something awful, I would always ask hometown friends to bring me really good stone ground grits and Duke’s mayonnaise because I couldn’t get either up there.
^Take it from the poster whose username is GRITS. 
The peach preserves is probably fine. Add pralines, Something made with vidalia onions, more peach stuff (candy or peach bread) and yes, BBQ sauces.
YOU can consider chicory coffee and beignets, but they are from Louisiana, not all of the south.
I make gift baskets from buying sauces at Bedners or The Boys fresh farm markets, both in palm beach county. I looked them both up, and they don’t seem to have gift baskets. Both had numbers to call.
Bedners is my fav. I buy several kinds of sauces, always one with Vidalia onions. I also buy hot sauces there. They have a dozen, so I buy the ones with flavor a I like.
When I make short ribs in the crock pot, is use to put in each sweet and sour ingredient. Now, I use one of the sauces, and always works well.
I also buy jam there, all home made, some with jalapeño
^Thankfully I have Google. I also picked up Rufus Teague Fish Rub because he fishes all the time. It is from Kansa City. A Smokey Chipotle corn relish. I know not the best way to do it but a Creole White Gravy mix. Louisiana hot sauce and pepper sauce. Will get the pickled watermelon finds tomorrow. I knew I should have grabbed.
I have 6 cups of pecans to make @LeastComplicated pecans and pralines. I can make pralines right? @jym626
Need to focus on Vidalia onions.
Yes, @gearmom. Pralines are pretty easy to make. http://www.neworleansrestaurants.com/new-orleans-recipes/recipes_pralines.php
@greenwitch I’m just got the Braswell Vidalia Onion BBQ sauce.
Also Ray’s Country Ham - Blue Ridge Mountain cured
Good reviews and I could Amazon prime it.
Next year I’ll plan better.
Oooh, not sure why I didn’t think of it earlier, but we have this wonderful stuff called Steen’s cane syrup. It’s like a really, really good molasses. I would’t think of putting anything else on my pancakes or oatmeal anymore (along with some pecans that I toast with oil and creole seasoning, and a splash of whiskey).
Hipster chefs love it too and use it when they brew beer, make sauces or whatever.