I think part of the issue of whether to fly drf/vol or m/u is if you are a commuter or not. If you live in Memphis, drf and vol are easy, you're an hour from where most trips start. If you're a commuter, scheds is not going to call you for a draft that shows in 2 hours if you are at your home. Vol trips go the same way. As a commuter you can't put in for general volunteer. You have to have at least some notice time in order to get to Memphis (front in dh trips usually being an exception). Commuting from DEN in my case, I can't even guarantee that I'll have a j/s to get to MEM. So that limits what you can get on vol too. Trip specific make up on the other hand is a sure thing. You know exactly what trip it is and can plan your commute.

The only time I put in for volunteer is when I have a one day gap in the schedule and I'm stuck in Memphis anyway. Don't do any m/u either unless I had to drop a trip in the first place and just trying to keep my pay correct.