Winobago
The shopping carts used by winos to carry aluminum cans, bags full of belongings, and whatever else they have salvaged in their travels. The Winobago is a transient's version of the Winnebago RV. Commonly seen parked near bushes, off-ramps and steam grates.
That park is a popular spot for bums. You can see at least one Winobago parked there every night.