Foggy morning wastes my morning

I was hoping to get the birds out to the elementary school 18 miles south and trio toss them (toss three at a time). I don't guess I'll get to. It was a very foggy morning. It had cleared up quite a bit until 2 miles before the drop (ain't that always the way?!) Then, suddenly, it was about 1/4 mile visibility. So, I started back tracking. I was going to go to the river, straight across from my 12 mile drop but I stopped off at the community college. It's a nice place to drop from. It's probably close to 15 miles. 70 minutes to get a 15 mile toss in AND I'm still 25 minutes from work! Ug! I could see the smoke from power company stacks which were 6 -7 miles away so that meant the visibility was pretty good from here. I used to let them settle 30 minutes, 2 years ago. Last year I got it down to 10 minutes. Now I just let them settle until they stop rotating their heads looking at the sky and start bugging each other for space and cooing. That was a bit over 3 minutes this morning. They did a semi-circle and took off straight for home.