I haven't posted here for a while, but I'm still using this lens as my go-to. I picked up a 62mm polarizing filter some time ago, while I don't put it on my 18-135 very often, it does help in some situations.
I was out in a canoe today and my camera and lens lay in the bottom, getting splashed from time to time, but with no effect on their effectiveness.
The next shot is one of those situations where I was out trying to get photos of something else (cityscapes) and when odd cloud formations with a rising moon appeared, I didn't have to stop to change lenses.