It could be worse- You could be in the purple school bus I saw this past weekend, doing all of 5mph up a grade near Missoula, MT.
One thing everyone overlooks: Tires. Make sure you have tires that can handle the weight you will be putting on them. If you are unsure of the weight, do a test run. Find a scale within a few miles of you, load the car up with everything you think you might have plus a few cinder blocks, and weigh the car. The quickest way to end a trip is with multiple blowouts.