The drive isnt bad unless it is snowing while you are driving. If the roads don't have snow on them you should be fine. The falls start to freeze around now. But keep dripping and freezing more and more as the season goes. The earlier in the season you go, the smaller the ice falls, the layer you go, the bigger they are from all those drips freezing and adding to the size all winter long. The toughest part will be the hike. If it's snowy, I suggest renting snowshoes and poles. It isn't a flat short path through the woods to the falls. I would give yourselves enough time to go an hour each way, bring a flashlight just in case the sun goes down quicker than you expected. There are multiple places in the area to rent snowshoes, and if there is snow on the ground, I wouldn't set out for the falls without them. No matter how tricky the hike is though, it is worth it once you round that last corner and look up at the tallest waterfall in NH. :)

I was there 2 weeks ago and there was a lovely flow of water, very refreshing.

There is a parking lot where you begin the hike

I hadn't hiked in years either - took us about an hour to get from the parking lot to the falls

On 4/30/2016 there were dogs everywhere on the trail.