She could also overnight ship the snakes to you (or father) before she does... it might be a little more expensive, but also less stressful on the snakes and keep from accidents happening... even really prepared, three days is a long time and that's a lot of chances for an oops to occur, and how terrible would it be to have a sick or dying snake far away from home and far away from the destination?
I think it'd be safer for the animals (and less of a stress on your wife) to get them overnight shipped the day before she leaves. This may be stupid, but can you have snakes on the base? I know there are some restrictions (ie pits) but I can't remember if it extends to reptiles. I'm guessing that you can by the wording?

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