Borders Click Here
In our experience, it's usually worth paying one of the guys that hound you the minute you get near the border. I usually stay with Rover, while Marty does the manly paper work, which is expected in Latin America. They even stamp my passport without me being present.
   

Insurance
Forget about buying special international medical insurance while traveling in Mexico and Central America. Prices for local care are extremely reasonable and the quality is nothing to fear. For example, we had our teeth cleaned in Mexico for $25 each. Marty also got ten stitches, novacaine and a tetanus shot in Panama, all for $1. Also, auto insurance is not required in Central America. However, auto insurance is required in Mexico and Mexico follows Napoleonic Law - you are guilty until proven innocent.

   
Laundry
From the Vehicle Dependent - Expedition Guide by Tom Shepard: "Take a 10 or 15 litre plastic lidded container. Put your washing, the washing powder and water at the beginning of the day with the lid on; at the end of the day's bumping over rough roads the gentle washing-machine action will have worked wonders!"
   
Things used most often
Head lamp, Scrabble, folding camp chairs, multi-mount tow hitch table, gas camp stoves, aluminum table, candles, cooler, drink mixes like Gatorade or Tang, 12 volt oscillating fan, power inverter, digital camera, zip lock storage bags, Garmin etrex Legend GPS, anti-bacterial hand cleaner.
   

Things we wish we'd left behind
Generator, bikes, snorkle gear, so many wet suits, clothes, soft ball bat, smokey joe bar-b-que.

   

Free Camping
We learned from www.freecampgrounds.com that most Walmarts, Cracker Barrel restaurants and 76 stations allow overnight parking to travelers.

   

Rover Tip
If you're wipers stop working, cut a potato in half and rub it on your windshield. The potato will supposedly whisk the rain away.