Thanks to everyone who commented. I think I’m just going to play my snares without any muffling at all. Most of the snares I have played in rehearsal studios typically have those plastic rings on them and I hate how they sound. I always take them off all the drums if they are there. To be clear though, I am not doing any recording. If I ever do record music, I’ll assess the drum sounds then. Until then, I think I’ll save my money by not buying gels or dots or what have you and not waste my time crafting a diy method. My drums will ring free!
Finding muffled snare drums in rehearsal studios is very common, and it's usually the misguided handiwork of the studio owners, most of whom are not drummers and frankly clueless. I never use snares in rehearsal studios. I bring my own. There's a common misconception among non-drummers that a snare should be taped up, choked and muffled until they sound like cardboard boxes. Or, drummers do it because they see other drummers taping up drumheads. It's all BS. The drums are made to resonate freely. They're supposed to resonate!
I do understand however, that if a drum has unpleasant "wolf tones," that is, bad overtones, then you might want a bit of damping, and likewise, on a big 16" or 18" tom to give it a little more focus.
Bass drums are a whole other story. There are so many pre-muffled heads available these days, there's no reason to stuff your bass drum full of foam, sheets, pillows, shirts, hoodies, towels, blankets, or any other "laundry." Something like an Evans EMAD and a felt strip on the reso head will give you a great sound with just a bit of full resonance, an actual musical note. I've discovered that this method works for me, makes the bandleader happy, and prevents the drum from sounding totally dead. My bass drums mic up nicely and everybody is happy.
I no longer have the guitar player saying, "That bass drum sounds like a tympani!"
I like Rob Brown and his videos, but he has one that recommends drummers take a towel, roll it up, tape it up, and put that into their bass drums. I have to disagree with that. Sorry, Rob.
I can't tell you how many times I have gone to someone's house to look at a drumset, only to find he has stuffed the bass drum so full of crap that it sounds lousy. Sometimes, I think a vast majority of drummers simply don't know how to get a good sound out of their drums.