I do love golf as an adventure, I like the idea of certain courses where you travel from point A to point B. But the kind of cross-country golf where, as kids, we'd combine multiple holes into a single hole, was only really fun in pretty small doses. My friends and I had ample opportunity to play that type of golf on a regular basis, but we rarely did. It was just kind of a slog hitting driver and then three fairway woods in a row or whatever. In fact, that experience is partially why I have so much time for extra, shorter tee boxes now. I didn't find it especially fun going driver, 3-wood, 3-wood, 3-wood, 8-iron, so why would I expect an elderly woman to enjoy it.
So I don't think I'd like a single hole that is 4.5 miles long. I might like an 18-hole course that goes 4.5 miles in one direction as part of a cool sight-seeing trip or something of that nature, but it would be sort of a novelty.