Seems to me that at most of the potluck parties, folks bring a bare-bones baking pan, or maybe an ordinary slow-cooker, or a plain casserole dish. Certainly no call for "fancy" stuff!
Think of the things you'd be most likely to bring to a "Y'all bring somethin' to share, hear!" party, bring one appropriate dish for that!
And, be prepared to take home some. These get-togethers so often bring so much food that folks take home half what they brought!
On the other hand, I belong to one social group where the consensus now is, "Let's cater it!" We may pay as much as $15 per person, but there's virtually no work and we've never been disappointed, at least not yet!
If there's a party like this, though, folks must remember that the supplier cannot serve if the event is in a Villages Rec Center - only party members can do that. But, the caterer can bring the food into the building.
SWR