Reservations are necessary, especially during hunting season. The cabins are rustic, but adequate, and are available all year long. There are also beaches in the Yakutat and Cordova areas suitable for landing and remote landing strips with Forest Service cabins nearby. I once heard Southeast Alaska referred to as Baja Alaska owing to the fact that the weather is more like Seattle than Anchorage or the below-zero temperatures of Fairbanks. The best time of year, I have found, is late April and early May for sunshine, and August for sport fishing.
Summer is brief but beautiful.
Long days and short nights leave a lot of time for outdoor activity. Funny, but true all the same. Winter is generally mild with long nights and short days. Although there is more snow than in Seattle, it rains between snowfalls keeping sizable drifts from accumulating. It was raining when I came to the area in the month of October.