I spend most of the year about the same - and when I want a vacation I take it whether it be summer fall or winter - doesnt really matter. Jim, I think that most of the reason you would think more towards summer being the time for those things because of where you live - a lot of us live in places where its 80 deg and sunny in November
The other thing that might affect the summer some is the old theory that there was a summer slowdown (the old college kids out of school stuff) - in my opinion that doesnt have any effect any more as the college kids have grown up with computers/internet all their lives and getting that access and a CC at college doesnt play into the equation much - 5 years ago there was a very noticable effect - but just doesnt seem to play anymore - my July sales outdid January by a long shot wheras in the old days it would be the other way around