As of 1-4-2012, Please Do Not leave TB's in the Fields Landing-area caches. 5 TB's marked as missing today; My apologies to the owners. One or more of the caches may need archiving after this...we shall see what turns up. Please contact me with any info on the missing trackables' whereabouts.
I'm glad to see that the 2 that I dropped off in The Landing have turned up. As for the ones from Whalers' Dry Dock, did you check the logbook? Sometimes you can figure out who took a trackable by seeing if someone signed the log but didn't log the cache online. Or someone who logged the cache online may have forgotten to log the trackable, or may be a new cacher who doesn't know how to log it. In either case, a polite email asking them if they took it may be helpful.
Unfortunately, some trackables, especially geocoins, do get stolen by people who don't sign the log or log the cache online. There's not much we can do about that.