We have the windows open here and it feels absolutely wonderful. I love this time of year, if I can dodge the raindrops this weekend there will be a bonfire.
Tapps is not narrow at all... its sprawling but has lots of islands and coves because its reservoir. Its 2.5 times larger than American Lake.
We were at American Lake (at the park and not on our boat) in July and it was really crazy there too.