I guess it depends on how you do it.
When I go into the rainforest, I used to take a 50mm on my RB67 or a 24 on a 35mm. Now I will take the 127mm on my speed graphic 4x5 (about 35mm eqiv35), my superwide pinhole camera (about 18mm equiv35 on square 120) or my 35 f2 on my d2x(because I like to stitch : )
I go for a slight wide usually, superwide is fascinating but I find that I see in a more narrow FOV usually
remember that you will probably be stopping down and on a tripod , so the performance of lesser lenses may be better than they are given credit for, for your purpose. (eg my 15-30 sigma was amazingly good at f11, which is a good aperture for some deep wide angle perspectives)