Chuck, I have a LE with the Horseman bag bellows .... and I happily haul the whole rig with me in the field too.
The shortest lens I can use with the standard bellows and still have plenty of movements is a 150mm. I use a lot of rise, fall and shift for landscapes. I can get about 25mm of movement (according to the scales on the camera) in any direction with my 150mm lens. Tilts and swings are also no problem.
Any shorter than 150mm, and I'd suggest a bag bellows. I also have a 90mm lens (on flat lensboard), and with this lens at infinity focus the normal bellows are so compressed that no camera movements are possible.
BTW, the Horseman bag bellows are really big. These bag bellows easily allow me to focus my 300mm lens at infinity. PM me if you'd like and I can send you a few photos showing the scale of 'em.