Most likely, that person would feel honored that you asked for their help. Not everyone has to have a flair for cooking to pitch in. Maybe cousin Sally folds wonderful napkin fans and creates centerpieces that are works of art. I bet she'd love to contribute her talent to the event. Don't forget simple, interesting potlucks.
Progressive dinners can be an adventure.
Get-togethers can be centered around decorating the tree, baking cookies, or crafting gifts. Even clean-up can be cooperative. The women in my family have always gathered in the kitchen after a shared meal. Many hands make the task short, and we chat and laugh while we're at it. It's just as bonding as the meal itself.