Marty,
I've yet to find anyone who processes E6, also known as
slide film, in Belize. Print film can be developed locally, so that's a good choice for fim shooters. Die hard slide shooters have to get their film back to one of the porcessors that are still doing E6.
Shooters used to use mailers from
Fuji or Kodak. This gets the film out of the hands of the TSA without causing too much grief, but you really should use air mail or even FedEx. The last Fuji mailer I used, in early 2008, was shipped to Duane's. Duane's still does E6 and even Kodachrome. Here's the link to
Duane's photo processing. If you're serious, and just about anybody who shoots E6 is serious about their imaging, you can also use the lab at
National Geographic. They also do print film. Either way, you can tell your photo-cronies "well, when I was on location in Belize, I shipped my film to Nat-Geo and they handled the processing for me".
My local pro lab handles E6. I shoot a lot of E6, especially in large format, so having the good folks at
Tempe Camera nearby is very handy. You can't just go to the local Wall-Mart and ask them to develop an E6 8x10, but Tempe Camera will do it for the low, low price of $4.15. They'd be more than willing to work with you on your film from Belize, too. Just call and tell them to expect a package and they'll handle it.
Hete's the
TSA page about film. If you're shooting something critical, like a wedding or other professional work,
insist on hand check. Lie to them if you have to, saying that you are shootig ISO 3200 film or X-ray film if nothing else works. Use a lead bag to force the hand search. Do what you have to do, but you'll get some fog from the scan if you send the film through. You may not notice the fog if everything goes well, but you'll kick yourself if you're shooting for publication and you lose a week's work due to a malfunctioning scanner or what have you. Don't risk it.
Dan