Guys,
If you have a PDA or Laptop on your trip you might like to check out Ultralingua's English-Spanish Dictionary. (There's a Free Trial). What's great about it is that it conjugates verbs in ALL tenses - and man there are a lot of them. It's hard to imagine that any other program does this better. If there is one, I want to know about it though!
http://www.ultralingua.com/en/products.php?productId=30718ULSEPalm&PHPSESSID=715aef456e4180cc5f77eedef0861d4a
Note that the link above loads a page showing the program running on a Palm PDA. Click the following link to select the platform you need:
http://www.ultralingua.com/en/product_search/choose_os/dictionaries/spanish-english.htm
Chica Chaser