Ok, I'm planning a little day long herping trip around the Missouri rive in hopes of finding a few species in particular. Would it be best to search on the Bluffs or down by the river? Would it be good to look around trash dumps by lakes and ponds if I can find any?
Any imput on where to look for any of the species is appreciated.

Here is the list of Nebraskas snakes and I am in FAR eastern Nebraska, Less than 2 miles from the river.
http://snrs.unl.edu/herpneb/snake/basicsnakekey.html