Actually, my crawl space is completely empty. If I store anything in there it would mean that I would have to crawl back in and get it eventually. That's the whole reason I bought a 10'x16' storage building.
Depending on how easy it is to get into, running the cables under the house could be easier. If your honey is game to use the fisher, she could drop it down through the hole you drill from underneath and pull the line back up. You'd get to hang out under the house drilling holes and feeding cables.
If the crawlspace is inaccessible, or you don't have one (slab construction), the attic will work. Attics are usually a lot hotter than crawlspaces, though.