Oh, MamaKit.....he's a big boy now! He can buy paper plates if he has to. I'm sure his dinners will consist of take-out primarily, but that's OK.
Try not to 'awfulize' about what may or may not happen. Your boys will be supervised, and they will get to spend time with him--and you won't have to!
It does get easier with time and practice. Be kind to yourself today!