Approx Timeline:

10th May - Vancouver
14th May - Seattle, Washington
18th May - Portland, Oregon
Mid June - Crescent City, Californina
End June - San Francisco
Mid July - Santa Barbara and LA
End July - San Diego
End Aug - La Paz, Baja California, Mexico
Oct - Guatamala and El Salvadore
Nov - Honduras, Nicaragua and Costa Rica
Dec - Panama. Huzzah!

Got to stick a massive disclaimer on this - Ant accepts he's not done nearly enough planning to create as acurate a looking timeline as this and takes no responsibility for any shit that arrises from people putting too much trust in it ;)