We camp every year the last weekend in May. They are the worst just around breakfast time and just around dinner time. How bad they are is entirely dependent on the weather. If we have a late Spring, they're entirely tolerable. If we have an early Spring, they can make your life miserable but there's usually a few hours during the day when they are bearable. Also after dark they're not as bad if you stay close to a camp fire.

It has been a relatively mild Winter this year, but I'm betting Winter will linger with us longer than usual from my perspective in the Upper Valley in Vermont (near the border of NH). You never know what you're going to get though. Particularly in New England.