I take it you didn't put one of those disposable tree bags under the stand before you set up the tree. If not, it's still not too late to use one (Drug Fair, Target, Wal Mart etc shoud still have them). If you can't find one try using at old sheet. Lay it out on the floor, take the tree out of the stand and lay it down on the sheet, roll it up and carry it out. Take the tree out trunk 1st to mimimize the amount of needles that will get all over. In our neighborhood the township has a pickup in mid-January. One of our parks also takes them for mulch. I'd call your town and see what they do.
Personally, ours will be going back in the box.