Up on the Miss. River in WI the best spots usually(in the old days) had willow blinds from day one till the end of the season. With beaver hardly being worth trapping they have flourished. It takes them a day or two but those willows will be gone. This year with very low water. My dad and I made a blind in the afternoon and hunted it that afternoon. It was in a slough were there was no easy way to get my 80 year old father out on shore as he struggles in the bad mud in this area. So we shot 3 ducks and stayed till close. A few other hunters went by observed where we were. Next morning out we go to find no willows. Thanks Brandon wanna be's. It wasn't beavers that took the willows and nobody hunted there. They just didn't want us to hunt there. Who I believe took it was speeding to us and saw we were in our boat blind there.. they stopped and choose to go elsewhere. We take down carefully, what we can daily and build it back if we hunt it again.