thanks for all the helpful comments. We live in an Apartment without a Garage, so we won't be killing the bikes that way, but I will make sure to get something on the inside of the car telling me to think of the bikes. I guess I will be going for a roof rack in a couple of paychecks. As for driving distance, probably 20-40 miles somewhat regularly and 300 miles every other month (going to her parents).
again, thanks for the insights.
Now the question will become: fork mount or upright mount!?