Gee, I have frozen just about everything, but I'm not sure about those salads, it might change the mix of the mayo? The veggies will be fine, do them in snall zip lock bags in serving sizes. Eggs I'd say nope, would go watery, Jello why, it lasts so long anyways :>) Bacon will be fine in small bags as well.

Good for you for preparing ahead, it sure helps things go easier.
Good Luck!
Kathy