Hi, guys. We are going to have to move sometime in between the time we send out our invitations and when RSVPs will be due and don't know where we'll be living yet. My mom said we could have RSVPs sent to her but she lives far away and I really want to open them myself. I was thinking renting a PO box for a few months might be the best option. Does anyone have any experience with PO boxes? I've never even seen inside of one. I rad that they come in different sizes and am not sure what size would be needed. Thanks in advance for any input!