To answer your first question, in-line ML's are legal and so are scopes in NH.

As far as how the deer hunting is, it really depends on where in NH you are. Up north, the freedom and land available to walk for miles with little or no competition for large bodied deer with decent racks is an awesome experience. Here cutting the track of a big buck in the fresh snow and running him down the "Benoit way" is the lure. Down in Southern NH the deer numbers are much higher, but people densities go way up as well. I'd say buck quality is equal to NY, but there is less pressure here. I love NH hunting.