Did that a few times years ago. I then learned real quick, about 100 miles out, I would tell my co driver I'm tired you need to take ove. Got me the bunk instead of sleeping across the dog house.... Slept with my pants on when sleeping across the dog house
Not really sure you would really have any other options. I guess you could do the third world trick in which you string a hammock underneath the trailer and sleep there. Most trucks have two beds in them so there is no need for "spooning" with your trainer. Besides that, most of the time you guys will be driving. You're only going to both be sleeping at the same time if your trainer isn't comfortable with your driving. So its up to you. Show him you know what you are doing and you guys should just be able to stay rolling. That was a pretty funny question though...