Yes, you can roll/unroll--but make sure you have basted down the sides first and also if you are going to do much of that, like with custom quilting, you will probably want to also do some SID to stablize it so the qult doesn't twist or torque on the frame. I will roll/unroll when I'm switching between thread colors (as long as it's not a show quality quilt because I worry it will get out of square). As far as too little quilting--that depends on your batting. It should saw what the minimum is. personally, I love to quilt so much that I don't think you can ever have enough--but not everyone agrees with that!