I assume that you've only probably seen the pass at San Pedro in rather
benign conditions. Believe me, it can get VERY rough and be unpassable for
days on end. Check out this report from Long Cay, which is about 10+ miles
S of San Pedro:

http://www.geoffschultz.org/Log_Page.php?id=475

as it will allow you to get in and out in almost any weather without having
to go down to the ship channel at Belize City, and you probably can't get
back to San Pedro through Puerto Stuck anyhow.

What is your draft?

-- Geoff