If Gunstock - you can drive around the Lake (Winnipesaukee) in a day (a few hours if you don't stop often).

From Gunstock:

Route 11 into Alton Bay (scenic), swing around to 28A north (turn left, go over the bridge, then take a left) and stay on that to the end at 28. Take 28 north (turn left) into downtown Wolfeboro (scenic, shopping). Take 109N through Tuftonboro and at the end in Moultonboro, turn left (25 west). Take that through Moultonborough, Center Harbor, and into Meredith (scenic and shopping). Take route 3 south into Weirs (if you want to stop at Funspot (arcade) it's fun) for some scenes and maybe some shopping / lake side (not sure how much is open). Then, 3 south to 11 back to Gunstock.

You can also do the reverse (start in Weirs as opposed to Alton Bay)

You can also take 16 (to the southern part of Conway) or 93 north (to Lincoln) to the Kancamagus highway (very scenic drive through the mountains but it might be snowy / ice in early March) or take 16 north into Conway (scenic / shopping).