Hi jhettwave1,
Welcome to the Q&A Board!
The idea of a photo guestbook sounds great! Using a polaroid camera would certainly be easy and less expensive but there is a digital solution (classic polaroid cameras cost about $30.00 on amazon) :
- use a camera and printer with wifi capabilities.
If that's the route you decide to take, get the equipment early enough so you have time to set up the system and practice using it. You usually have to use a computer to initially configure the system.
Canon makes wireless cameras and printers. Here's two examples found in our Amazon shop:
Canon PowerShot SD430
http://astore.amazon.com/digicamhelp-20/detail/B000B8UOV6/104-7644676-9470310PIXMA mini260 pinter
http://astore.amazon.com/digicamhelp-20/detail/B000I5N5YK/104-7644676-9470310Besides Canon, Kodak, and Nikon make wireless digital camera products:
eg: Nikon CoolPix P3 & Coolpix S6
Kodak EasyShare-One
Hope this helps a bit. If you decide to go wireless and have the time, let us know how it works out.
Congratulations on your upcoming wedding.
As an aside, here's an excellent article on taking wedding photos with a digital camera:
http://www.digicamhelp.com/learn/places-events/wedding.php