Hi Scott,
Normally when you travel to a different country, the customs department at that country will want you to pay an import tax when you arrive. This is solved by various means including a CARNET for all your equipment or declaring the equipment as in transit when you arrive. Each country is different as to what local custom officials expect from you.
In some countries in South America, you may be expected to contact a local import/export company to do all your paper work in advance. In other countries, you just declare the equipment when you arrive and the customs agent stamps your passport. You may want to contact a local Director of Photography to know in advance what will be expected from you at the airport.
Regardless, you will need various copies of a document that lists all your equipment and the serial numbers. Always declare all the equipment you are traveling with BEFORE going through customs.
If you can, travel with someone that speaks the local language… you will be happy if you do.
Power in South America is usually 220 volts, 50Hz. Some exceptions are parts of Bolivia and Peru where the electricity is similar to that found in the USA (110v, 60Hz).
ALWAYS bring your camcorder as carry-on luggage. The same goes for your video monitor, take it onboard as carry-on luggage.
Regards,
Paul Thurston