I always prefer to find the sound guy the second I get to the venue, introduce myself, and let him know that I'm eager to do whatever it takes to make the band I'm playing with sound the best we possibly can. If that means muffling, cool. If it means wide open, cool. If it means retuning, cool. Whatever. Watching the big sigh of relief come from the sound guy as I tell him that is worth its weight in gold.
I'm not dependent on whether or not a drum has to be muffled or retuned in order to make or break my gig. I play the drums. They don't play me. I manipulate them however I want in order to get the sound I feel is best for the gig. I do, however, rely on sound guys all the time to get my playing represented the best it can through FOH. If sound dude thinks a drum needs to go higher, I'm tuning it higher. If sound dude thinks one of my drums needs some gaff and tissue, or a slice of onion on the batter head, I'm game. If I leave the area and sound dude can't find me, I'm expecting that he'll change something if he needs to.