Dave,many times I never see a lodge or dam. That is the beauty part of using a castor mound.You are dictating to the beaver where you are going to catch them.Setting dens,runs and crossovers, the beaver dictates to you ---where you must set a trap to catch him.I would much rather dictate the circumstances---not the beaver.
yes ,you can catch them all.I learned to trap beaver with footholds,good to know how to use them.I havent set a foothold for beav in 6 years,and dont intend to.
Good luck, Tom