I think a 3-gal. pot sounds a bit too small, 5 might work. After all the a.m. is rated as hardy to zone 2. It's probably worth the experiment, anyway.

I think it would work. But as big a problem as the cold is, the root ball warming too fast in the spring could be equally uncharacteristic. You may find buds breaking too early, and have to bring them inside on some cold spring nights. I wouldn't take the insulating bags off until you absolutely have to, so the cold can be kept in.
Rick

I just purchased my maple a few days ago with the thoughts of trying to bonsai the plant. It is about 1'-0" wide by 4'-0" tall (in the pot). I have decent sun and will be able to bring it in side my place (as long as it stays a decent size). I t has a just a few bruised leaves but I will prune those. Should I remove some of the soil it is now to get into more nutrient rich growth matrix? Thank you for any guidance you can give.

Hu, this is probably the wrong forum. There is a Bonsai forum that would probably be a better source for advice.