Are you wanting to fish by boat or by shore? There are a few pits which you can dump a boat into, I can even get my 20′ Tiller into Huntington Landing. Pennington & Portsmouth both have a normal concrete landing. Alstead also has a fairly usable landing for a larger boat.
Do you want to catch Trout or Bass/Panfish?
Trout, I would be there ASAP after opener. Bass can be had fairly easily, just locate shore structure and fish. They drop off so quickly that fish really congregate to any sort of shore structure.
Ice fishing is also fun, but can be a bit of a workout. I would definitely hit the lake you want to fish in the summer with your boat and chart out the bottom. Do it once, and you’ll know where to fish in the winter. The DNR also stocks the lake right before Ice in, so right after opener in Jan is a good time to go.