AJ - You have mentioned many times about keeping the children at your wedding quiet - so giving them the opportunity to gorge on a sweet buffet may have them bouncing off the walls.
As you asked for opinons - mine would be a mix of sweets if you do decide to have any, but given the fact that you have often discussed overspending budget etc. I think it may be a cost that you could do without.
I am not sure of the outcome of your post the other week discussing affording to buy yourself a new shirt for the wedding - things like this that are for yourself should be a priority over giving your guests something that is "in" at the moment and you feel you should have.