Keeping drummers and bassists inline is not too difficult. They aren't that smart. Tell the drummer that there is a little bindy bag in it for him if he can keep things productive for the practice. When you are done slip him a couple $ and tell him to score it himself. He will be more than happy. The bassist is a little more work but easy to take care of too. This one takes some collaboration with your frontman. Together you convince the bassist that there is someone else waiting to take his spot that is better than him in whatever your bassist is lacking (doesn't matter, insert something that is his sore spot- technique, theory, songwriting, stage presence, whatever)and doesn't waste your time. A little intimidation of this sort goes a long way. The nice thing is that you can use this approach with the drummer too if he isn't a substance user. 9 times out of 10 they won't see though your ruse and you get the benefit of peace and them concentrating on performing at higher levels to suit your needs. Manipulative? Yes, but well worth it. Flea style voyages can be nice but are not always necessary and can be annoying. A drummer who thinks he is the next coming of Bonham or Neil Pert's protege can also be enough to make you cringe.