How waterproof is the remote BTW?

No more waterproof than any other stereo remote. I just make sure not to submerge it. We keep it indoors except when we're actually using it. We set it on the lid that covers the hot tub filters while we're using it, which is the same place I set my drink. It only gets an occasional droplet splashed on it and those don't seem to be a problem. Submersion would kill it, I'm sure, but I won't be doing that.