For that long of a trip, it's best to get started early and have a lot of flexibility. Products like "fishweather" w/ maps that show the wind fields and the timing of the shifts can be very helpful for planning. There could be more volatile weather to come in the next three weeks or so. Early May can be nasty in the western North Atlantic. When it gets fit to go, you want to be ready to get moving and keep moving until conditions become unfit. I had some survey work to do in the mid-Atlantic recently w/ my 56' DMR. From March 22 to March 31, there was not more than one consecutive day of decent weather from Hatteras to Cape May. We had to wait ten days for a weather window which started on April 1. We worked daily through the 6th. By April 7, it had gotten shitty again so we had to leave her tied up for a couple of days. It's generally better from here on into May, but it seems like this winter won't let go. It gusted over 70mph here last night.