Lots of great ideas here...gotta love lensless photographers...the crown graphic idea is a good one too....pretty much the same as my linhoff setup...I really like the apogee interchangeable plates...any lightwieght field camera will do as long as it has a flexible international back that accepts polaroid backs. rollfilm backs etc....another good bet would be a Busch Pressman...you can find these dirt cheap and they are great.