(OOC

Michael travel info--almost entirely complete, and everything stated by ajanders is correct. Don't forget that you get one free hour of Hustling per day without penalty, so using that will mean one less hour of forced march, which is always a good thing. Also, if you're planning on going by mounts, forced march is a bit sketchy because mounts automatically fail their Con check and take lethal damage, which means that they can only really be force marched two hours a day at full speed, the third hour they'll be exhausted and they'll collapse unconscious at the end of it from fatigue even if they survive the lethal damage
Ironically, this is how my characters without horses can sometimes keep up with encumbered horses, since a PC can do a lot better forced marching if she makes her Con checks)