I went to Magic Wood last summer, and we spoke to the people there about the possibility of climbing in the winter. The locals said that it's nigh on impossible to access when there is snow due to the altitude, dodgy roads etc... Also it would be dicey getting down to cross the river as it's pretty slippy. I would advise to check the weather.
You may be alright be the end of March tho as the snow may have eased on the roads. If you going to be there for 3 months, I would check out cresciano first, then go to magic wood - they are only about 2 or so hours apart.
There's a really good guest house / bunk house 5 mins from the crag, where I stayed, prob find the number for you to check on weather.
