Tough setup for beavers

I found this location where beavers have been climbing up onto the vinemaple and cutting down a few new branches to eat the bark and fix the dam. My problem is to try and give enough time for the beaver to climb all the way out onto the vinemaple and begin chewing beore the camera takes a picture.

The easy and first thing I might try is to set the camera on 10 second delay using the delay on the camera, this is easiest but that setting on the camera only works for the first picture, so I will use a board that I know to be a little less sensitive and hope another animal doesn't pass by and trigger the camera. The next choice is to use the XLP board in stealth mode that waits 5 seconds to trigger the camera, but I have only one of those boards and it is being used on an otter landing. The last choice is to use a very small hole or cover the pir lense to a small opening and aim it at the middle of where I want the beaver.

I think I will use a small opening and set the camera on 10 second delay. I will drill a small hole in a piece of plastic and use double sided tape to hold it over the center of the pir hole lense, this will give a small trigger area so I can aim it where I want the animal.