It sounds like we have very similar jobs. I also am an itinerant school district employee. I serve 4 schools, but work out of the district's central office. I try really hard to not bring work home with me, but during busy times of the year (November/December, April-June) I usually am forced to bring home work mostly to write reports. I do not check my work email after work hours, however, as I have found that there are lots of lonely/bored educators out there that are more than willing to pester me with emails all night long. It can wait until the morning, and if there is a real crisis (which is very rare) my supervisor and superintendent both have my cell phone number.