I never run my bass through a stage monitor even if one's available, and I never use more than two tens. I never have any problem hearing myself either. I agree about half-stacks being able to go louder than any guitar'd player needs to, but you don't put out a fire by dousing it with gasoline.
Bill...If I had two of your DR250's I would never use a monitor or anything else for that matter.

I gotta start building!