I get the whole stop somewhere along the way thing, but is that really going to work on potty training day #2? I had planned on starting over Christmas break when we had almost 2 weeks with no therapy, but my in-laws changed that plan by throwing a fit that we weren't coming to see them. I really don't mind waiting to potty train, but we're trying to get Noah into the 3 year old class at Brian's school and if Noah's not potty trained that's not going to work. School is still 9 months away, but it took a year for Noah to accept his first bite of baby food, so I try not to assume that anything is going to be quick and easy.
I think the best option is to make my mother-in-law potty train Noah since she's the reason we won't be home, but I doubt she'll go for it.