I am in Chicago and always have my boat hauled out and winterized. I
found a slip with water/electric for the same $$ as winter storage. If
I take that and drain the water lines and a/c line, will the engine be
okay? Can I put a light bulb or something in the engine compartment
or does it need to be winterized? I can go over there and start the
engine if needed. I doubt I would be able to use the boat as much of
the river outside this marina does freeze over.

If I wanted to use the boat (like to sleep there), is there any way I
can still use the water system given the freeing temperatures?