pt. ?
your idea is to have a bitcoin address next to the bank number where people can send monies to right?
shes not just taking cash out of cards

in any case, yes its a gr8 idea!
I seriously doubt any one of your family members will send BTC, simply because they have no idea how to use it... But you can expect everyone to come to the wedding full of questions like " what is this bitcoin thing? " Be prepared for the harder questions like " how do i get some? "

hey do you want some general purpose bitcoin business cards to hand out?

I can send you a 100 for just the shipping & handling cost