There isn't really enough information here to answer, but...

In general, no. If you have AWD/4WD and are staying in the Champlain Valley, you definitely do not need snow tires, unless there is a large storm and you plan on driving before the streets have been plowed.

If you are venturing outside of Chittenden County, they would be good to have, but buying and installing winter tires for a few day trip is not worth it to me.

I went years in AWD cars w/out snow tires, and I didn't stay in Chittenden County. No accidents. Drive accordingly and you'll be fine.