I agree with everybody that says as long as no one can see it you will be ok. There is a guy a few miles from me that started the same thing as a "hobby" and it quickly got out of control...he was able to find whole GT
's for 100 bucks and alot of the time free. and needless to say the entire outside of his house ended up being consumed by old lawn mowers and he has constantly been harrassed by neighbors that are tired of having to look at a "junk pile" all the time. I will be out that way this evening, I will snap a couple pics so everyone can see what I am talking about and why it's a good idea to make it so no one can see it, let alone even know where it is. Except the poeple that need to know it's there.