Yes, they are not fun to do, especially when your vehicle spent it's whole life in NY/CT.
I did mine about a year ago, and just last night while on lift at work, I reached up there and found nothing but dirt and little rocks. And yes, the little drain hole was clogged with a rock that I dislodged. So I cleaned it out with shop air and should be good to go for another year.. Will have to keep up on cleaning the little pockets out every year.