All countries need an international vet certificate and recent shots list. Check the website of each country to see if they need anything else.
The only county that does not have an embassy in Ottawa is Nicaragua. You will need to go to their embassy in Washington DC (sort of on your way anyhow).
We did the trip in 30 days, stopping for a week in Guatemala to visit friends. You have lots of time.
DO NOT DRIVE AT NIGHT. I almost t-boned an 18 wheeler at 80 km an hour because it was across the entire highway — completely dark without even a reflector. The engine died when it tried to cross the major highway and the driver just left it there. Small kids, entire families, and farm animals all over the roads are equally dangerous/hazardous.
A tip - pack everything in clear plastic containers, and have a list of everything (in Spanish if you can) - taped to the top of each box - that way the customs guys can just look in, see what you have and you won't have to haul everything out for them to inspect. The dog will discourage them from coming inside to inspect as well.
Always use the young guys at the border to help you. They are well worth the $5.
Try to arrive at each border in the morning. Every border - entering and exiting - will take 2 - 3 hours - so bring coffee, something to read and relax. Vets only work day hours and take lunches off - so mornings are best, and not Sundays.
It was an amazing trip - if you stay on the pay roads it will be smooth sailing. The free roads are much, much rougher, but more interesting sites.
Check the web for news of any problems - but know that every country you go to, they will tell you the NEXT country is very dangerous. We did not go through El Salvador - but others have (see Chris and Kristin -
www.drivetheamericas. com) They loved El Salvador. They have just driven from California to South America and are on their way back.
The book - Traveler's Tool Kit: Mexico and Central America by Rob Sangster and Tim Leffel was the most useful book (and I bought them all)
I bought a Magellan GPS - it took us to the front door of the Nicarauguan Embassy in Washington - a godsend. They now have fairly good maps of Central America you can buy online - Google "GPS maps for Central America". About $150 per country. GPS maps for Mexico and Costa Rica were really needed.
The so called World Phone from Rogers and Blackberry's so called "global services" did not work - useful only in Canada and USA. Buy cheap cell phones with SIM cards and pay as you go minutes.
Good luck, write it all down, take lots of photographs and send them to me - I will post them on the site.
Drive carefully during the day, don't drink and drive and for God's sake - don't let anyone near your vehicle if you think they have smoked/touched or even thought about drugs - it is more serious than you can even imagine.
E-mail me along the way. I look forward to buying you guys your first cold one in Panama! Roberto Chocolaté
PS: it's now Dec 19th - it is 94 degrees and sunny. Bring sunscreen.