i too have recently made the move to 4x5, and knowing very little, bought a dercent kit on ebay. i'm happy with it, but i've learned so much more since then. may i suggest you consider the camera in this review: http://www.thalmann.com/largeformat/anba.htm since you've indicated you want to back pack and still have extensive view camera movements. in any case Badgergraphic.com seems to be a pretty good place to see what's available and/or perhaps shop. good luck.