I make the ones for our trip using MS Word. I import a picture--this year it was one I took of the Animal Kingdom Lodge lobby. It was a somewhat dark picture so I overlaid it with white text in Papyrus font in the return address field:
Bob & Larry
Walt Disney World
January 26 - February 5, 2006
And in the address field:
Disney's Animal Kingdom Lodge Resort
January 26, 2006
I updated the date for each day of the stay when I printed each envelope. I used size 6 3/4 self-sealing envelopes and fed them into my printer. MS Word has a tool that helps. From the Tools pulldown menu:
Tools-->Letters and Mailings-->Envelopes and Letters...
Sometimes it takes a bit of work to get it to line up correctly.
I have done them many different ways. One year I printed out the word Mousekeeping on them and I then used a stencil with swirls and circles to make Mickey heads. I also let DD doodle and scrible on them.
One year I found clip art and printed them out. For the last several trips I have used my Mickey head punches and scraps of Mickey paper to decorate them. (yes, I am a scrapbooker! [img]/ubb/images/graemlins/grin.gif[/img])