Sandwich Mtn is on my anti-4000 footer list. Doesn't get as much traffic as it would if it were a few feet higher. Nice peak with nice views. Nice views from Jennings Peak too.
There is a sizable stream crossing right at the start of Sandwich Mtn Tr. (You can go around it by walking the road plus a short bushwack.) You have to cross the same stream on Drake's Brook Tr, only farther in, so it might be worthwhile to check it near the road if you wish to hike DBT. Fletcher Cascades (off DBT) is also worth a look-see (gets a little steep toward the end).
Doug