Can I skip my run if I have to leave?

This is actually against the rules. If you enter the hunt and answer “present” at roll call, you have to have a really good reason to miss your run (like a broken leg, or a heart attack). If your travel plans require that you leave before the end of the trial day, you should seriously consider whether or not to enter the hunt. If you do have to leave before your run time, you need to tell the hunt chairperson and secretary ASAP. (The reason this is so important is that the absence of your dog may create a problem for how the rest of that pack is judged.)