If you have a close shutoff it's not bad. You can likely purchase a repair kit for it. Makes it so much easier! If it's a screw-on bib it's super simple. Cutoff water supply to house or inline shutoff, remove old house bib, teflon tape it, put on new bib. If it's a sweat connection that's a little more involved.
Where is it leaking? Can't screw the hose on tight enough to prevent a leak? Not to insult your intelligence but have you tried replacing the rubber (or similar material I'm sure) seal that goes in the female part of the hose attachment? I used to have a drawer full of them and have to replace them once a year.
Like the black piece on this pic.
can you get to the pipe in the crawl space? At least shut off there first?
It's pretty common, I rebuilt about 10 of those last year on bank owned homes. The rubber ages and looses it's elasticity.Like Crbn79 said, I'd first try to snug up the little nut just behind the handle. In the old days, that "packing nut" squeezed string-like packing that seals the valve stem. New ones just have a rubber seal, but if the nut gets loose, it will still leak.
It's pretty common, I rebuilt about 10 of those last year on bank owned homes. The rubber ages and looses it's elasticity.
I think I've been sweating pipes since I was 10. Seriously, check the bib, you should be able to wrench the core out. A washer is a lot cheaper and easier to replace than the whole valve.
Sweating pipes was a lot easier back in the old days with real lead solder. Now, especially with big brass shut-offs, you gotta get them good and hot. I only use MAP gas these days, cause propane doesn't get hot enough.