Like several of our neighbours here in Port Hope we installed a generator after the big ice storm of 2014. It is situated conspicuously in front of our above ground pool. (The pool is hidden by the Engleman Ivy) To disguise the plastic, very out of place 'look' of the the generator, we built a free standing dry stone wall around it.
Now it's as if the generator has just 'faded away'.
It seems to me that this is very simple solution and could be applied in situations where you had propane tanks or other unsightly things on your property that you wanted to hide.