Run out of diesel

This is a long shot but wife has come down Wed night with our motorhome and run out of diesel a mile or so from the camper van field. She is parked up in one of the sites for support  vehicles etc. I won’t be able to get down to the site much before 9 pm on Thursday night & until then she can’t go anywhere. Is there any kind Samaritan who could stop by with a can of diesel on their way in on Thursday  morning to get her moving again? Of course she will reimburse the cost.