Also, part of the reason I chose this area to model was I spent many a happy hour railfanning there with my dad. And always during the summer. So the summer setting is definitely evocative of those memories.
Now that said, I did briefly toy with the idea of doing an autumn-themed layout with all the brightly colored foliage. However, that would've required making hundreds of different color puffball trees. I never would have made this amount of progress if I'd modeled the fall.