I've been thru PR with dive and photo gear no less than 3 times during the period this thread has existed. (3 round trips I mean). I've never had a theft. I have had clear evidence that TSA or someone (didn't always find the "TSA inspection notice") has been thru the dive bag.
That said, of course that's only anecdotal experience, I wear my dive computer on the wrist now (or when console it was with the camera gear), I carry as much of my photo gear as I can in a Lowepro carryon backpack (everything but housing handles, large dome, and arm components), my gear is just "ikelite" (although I do have some pretty high-dollar W.A. and zoom lenses), and my scuba gear is el-cheapo "Sport" class equipment (Oceanic Alpha 8 Sport reg) and jacket BC....so maybe it's just not that enticing a target.
A Lowepro AW300 (Vector?) backpack does fit as carryon even below the seat or in the overhead even on the smaller AE turboprops, and I've never been asked to check or 'gate-check' it on Caribbean itineraries.
If you do visit PR, I strongly recommend Mona and Monito for diving, as well as East coast (Fajardo) type diving. There's a few different liveabords that do the Mona and Monito thing, from the Juliet that I sailed with to the Spree (which I've also been on but only in the Flower Gardens off the TX/LA coast). There's also a lot of land/surface stuff worth seeing - El Yunque rainforest, lighthouses and cliffs off Cabo Rojo, bioluminescent bays....
Edited by rtrski, 28 May 2012 - 05:58 AM.
Current rig: Sony SLT-alpha55 in Ikelite housing, Sigma 105mm f2.8 DC Macro w/ Ike 5505.58 flat port or Sigma 8-16mm f/4.5-5.6 DC HSM behind UWCamStuff custom 5" mini-dome. Dual INON z240 Type IVs triggered with DS51 for TTL mimicry, or DS51 alone with home-made ringflash assy for macro.
Topside, unhoused: Sony SLT-alpha99, Sigma 150-500mm + 1.4TC, Sigma 15mm diagonal fish, Sony 24-70mm f2.8 CZ, Tamron 180mm f2.8 Macro...all the gear and nary a clue...