I will be hand adressing my invitations, both because I think it looks better and because I feel it's more proper etiquette. But is it ok to use labels for the return address on the back of the invitation envelope and on my response cards? I was thinking about creating some clear labels with my address in the wedding colors and a calla lily picture I used on my save-the-dates to tie things together. Is it still considered poor etiquette to use labels, or does that just apply to the recipient's address?