It worked! Last time I made cookie dough I immediately put half of it in the freezer and only baked a reasonable number of cookies for three people. I just pulled it out (maybe 4-6 weeks later) and it baked up just like new.
Not only are we not tempted to overeat, but we get fresh cookies twice with only one mess.
(And if anyone knows of a good product to clean aluminum pans, looks like I could use it.)