Glad to see there are other options beside the rv paper, which I hear is like sandpaper.
I've had some plumbing issues at my house, well neighbors tree busted my pipe. The plumber came to open the line but couldn't fix the pipe til a few days later. He specifically told me not to use charming, been using quilted ever since. The separate bag sounds like the better option, especially with the smaller tank. As for emptying, I was told black first then grey to help clean out the line.