Who should sit on the tractor?? he don't want to walk, but I don't either.?

Who should sit on the tractor?? he don't want to walk, but I don't either.? Who should sit on the tractor?? he don't want to walk, but I don't either.? may I ask your opinion on something? I am a 21 year old female picling up bales of hay on a 3 hour trail with a 16 year old boy and trying to figure who to put where, if you were working with the boy and the shoot consists of a 3 hour tractor trail ride, trails are very muddy and the tractor may spaltter mud on the person walking or run over the toes of the person walking(does often), and there is only 1 tractor and we can not switch it has to be one way or the other the whole 3 hours, and the tractor is only big enough for 1 person to sit on it. either he can sit on the tractor and I can walk and pick up the hay, or I can sit on the tractor and he can walk in the mud and dirt and pick up the hay, there is no switching, it has to be one way or the other the whole way. which one would you would recommend? both of us want to ride, but one of us will have to walk. Which of us do you think should sit on the tractor and which of us should walk? its a 16yr old boy and Im a 21 yr old girl.