There's a Daytime Dad's playgroup held by the Visiting Nurses Association your husband might be interested in. It's up in Burlington so it'd be a bit of a trek.
"Daytime Dads Open playgroup for dads and children ages birth to Kindergarten.
Call Josh at 862-2121 for information." 9:30 - 12:00 on Fridays at "The VNA FAMILY ROOM is located in St. Joseph’s School, at 20 Allen Street in Burlington. VNA FAMILY ROOM is part of the Visiting Nurse Association’s Family & Children’s Services Division, and
is one of three parent-child centers in Chittenden County."
Another website that might be handy is http://www.findandgoseek.net/
It's a VT kids specific event listing and review site.