300 miles a day? What? You can't be serious. Do you work just one or two days a week. That is a crazy amount of miles in one day assuming you have a week full of days. Wait, what am I talking about? 300 miles a day is a crazy amount of miles in a day no matter how you look at it.
I'm not putting you down or anything, just seems insane. If you're somehow doing it, more power to you.