A Crown or Super Graphic are light enough for hiking in the field, can be handheld in good lighting, or can be used successfully with a relatively lightweight tripod/head. As said above, for many (most?) situations the limited movements are not an issue. But there are better choices today, like the little Wista wood fields and others which are really lightweight and offer movements. And if you really want lots of movements and longer bellows, there are the lightish Wisner techfields.
To add to the list of press cameras for field use, I would mention the little metal Horseman 45FA with reasonable movements, but with limitation on lens selection because of small front standard.
And to add a little bit of history, there is the granpappy of the graphic press cameras, the RB Cycle Graphic, designed with recreational field use in mind, thus the reference to being transportable on a push bike. Back in 1910 or so, this was revolutionary.