I apologize in advance if this question is irrelevant to the subject of this board but it seems the most likely place to find an educated answer.

I live on 5 acres of forest in Victoria on the Canadian west coast and I want to build a rock climbing wall supported by two trees spaced 8 feet apart. The trees are 16" and 30" in diameter respectively and I have no doubt that if I fix a wall made of 2"x6" spruce and 3/4" plywood to them they will support it easily.

I am concerned that I will damage the trees though.

I have been told that I should use big lag bolts and soak them in Clorox first to reduce the risk of infection to the tree. Is this accurate/sufficient? Do I have to worry about termites in my wall?

Also, in a year or two I will want to take it down (since we're house sitting) and move the wall to a new house. Will I have problems disengaging the wall? What should I do to fill in the holes or should I just screw the bolts back in to protect the tree?

Has anyone had any experience with this kind of set up. I'm sure it's pretty unusual but any advice would be greatly appreciated.