Every time I return to this subject in my mind (rather often), I realize I just need a bigger format for what I like to shoot (landscape/nature). I've tried 3 medium format cameras and wasn't really that sold on any of them...for the hassle over 35mm shooting, I may as well shoot something big (or so I always think when schlepping a 6x7 MF or something around).

So...is there a place I can look to start getting some knowledge of portable LF systems, and how big one would really be? Ideally I'd like to be able to put something in a back pack small enough to Mt. bike with. If I can't do that, I may as well stick to my 35mm stuff, or perhaps find that perfect MF camera out there somewhere...
Thanks for discussion,
Jed