I'm thinking of riding along the north shore of Lake Superior on a cross country ride this Spring. I would expect to be in that area the last week in May. I have heard that black fies might be bad there that time of year, but don't really know how bad they are. Are they a problem while you're moving or only when you stop? Are they a major problem or merely an inconvenience? Would things be better a couple of weeks later (I can reverse my route and hit that area on the way back to NY)? Any insight into the situation would be appreciated. Also, what is the weather like around there that time of year? Thanks.