Park it where it can not be seen. If necessary, cover it with a tarp, or get a couple of those wood fence panels from Home Depot, and lean them up around it so it is not visible from a public street or alley and you are good to go.
The neighbors will love this.
The garage is full of junk and the truck will not fit in it.
I think we might be getting to the root of your problems. Explain to us why you want to keep this truck and why you think you can trick people into think the truck is "operable" by pushing it around the yard?