It is very simple to just add an extra faucet under the counter in your bathroom or kitchen, or right next to the washing machine valves in the laundry room. You can just use the cold water line or you can do both hot and cold if your water heater has enough capacity to cover a typical water change. I love the idea of a hose reel, if you have the room for it.
Ideally, you'd have this hose devoted to this purpose; that way you can buy a few sets of male and female hose ends, cut the hose to the exact length required and install the threaded ends. As TB stated, excess length is not desired. Buy a nice long hose, 50' or 100', and then make up pieces to the exact lengths you need for various purposes.
Draining water outside in extreme cold? Hah! Unfortunately, this is my specialty!

If you're on a well, you should be able to do this since you're likely rural enough to have the space outdoors. Just make sure you dump it far enough from your house, preferably on a downslope, so that you don't get an unwanted skating rink in your yard.
I don't rely upon siphon action to remove water to the outdoors because I need to dump it a fair distance away from the house, and because almost all my tanks are below grade in the basement. My waste water gets pumped outside, giving me a bit more flexibility as to where it goes.