Greetings from Manitoba, Supernaut!! What I do for my cameras is that I use an alarm panel battery (or sometimes emergency light battery), put it at the base of the tree, and then just run a wire up to the camera battery port. best part is they are fully rechargeable and you should be able to find them for under $20 each. They are available in 6V or 12V depending on what you need. They will run the camera for a LONG time in the summer and do pretty good in the winter too.