I haven't had my hearing tested in quite a while. Last time, the drop-off wasn't too severe, but it was there. I've been wearing plugs to shows for years now - they do help. I still usually take them out a few times per show for favorite songs. I used to try to balance out the perceived loss of high end by not putting them in all the way, but I've found lately that if I put them in fully (you know, like the instructions say?), that it makes the mix clearer.
My current weapon of choice is Vibes. I have a pair that I take to shows, and my older pair stays in the car now in case I forget. There are a couple others that look interesting, too. I keep threatening to do the custom molded ones. One of these days.