Depending on the size, I would pot it into what you want it to grow in at the start of next growing season. I'm guessing it will be bare-rooted or in a rather small pot, which will likely be a pain to regulate water level. If you do have to do this, after potting water it in like you would any other time of year and put it in your garage like everyone else said. If it's around, I like to use about an inch or two of snow every 2wks-1month, just depends on how dry the air has been. The snow melts slow so most of it absorbs into the potting mix -vs- watering, sometimes with water a good deal of it will run through and out the bottom of the pot.
Good luck and welcome to the forum, you better start looking for room for trees because this is very addictive.