Well now that you got me thinking about it, the breaches have developed on outside curves, alright, and in two places mainly. Near the bow of the boat, about a fifth of the way back, and about at the waterline or a little above it. Probably from my idiot habit of beaching the boat at top speed, whereas I haul butt right at the shore, then do a good layback to raise the bow and see how far I can skid up out of the water. I've never quite got the cockpit to dry land, but I never stop trying.
The other place is aft of the cockpit, where the sides of the hull transition to the rear deck. Probably due to my habit of climbing aboard there to self-rescue "ride-'em-cowboy" style. I often jump out of the boat to swim or whatever in deep water (never let go of the boat or paddle!), then clamber back aboard when ready to get on with my life.
In either case the cracks are usually some 3 or 4 inches long, and usually I tape over 'em or douse 'em with a little 5-minute epoxy, clear fingernail polish, varnish, super glue, or whatever else is handy until I get around to doing a real repair with 'glass patches and 'poxy. I guess my Outer Island gets about a dozen of these kinds of breaches per year. It was done in 6 oz plain weave e-glass inside and out, by the way, and tends to live 24-7 on the racks which doesn't help anything at all. I'm not sure what causes them, but it almost looks like UV and/or weather damage as much as anything. I've never really given them a lot of thought other'n I wish they'd quit happening. The Cormorant gets 'em too, tho' not as often (the boat doesn't get used as often, either), and only on the stripped deck, never on the S&G hull (except where I punched a hole in it fair and square by dropping it on a jack stand). It also sports 6 oz inside and out on the deck.
Other places that go to bare wood are pretty typical high-wear spots, like where I stow a spare paddle, an anchor, where my heels end up in the cockpit, on the stem or stern, places like that. When they develop I just add a glass patch or two or three and jump back in the race.
I inspect the interiors fairly routinely with a bright light and a vanity mirror-on-a-stick affair, but like I said, I've never found anything needing repair yet. Thank goodness for that, too, 'cuz it'd be a tedious PITA to do. I always approach those inspections with dread, and I reckon my luck'll run out sooner or later.
On S&G hulls I fillet and tape the seams inside, give the otherwise bare plywood two good coats of 'poxy, and glass the outside. I got started by reading Chris Kulczyski's stuff, and CLC follows his method also, on a HUGE scale I might add, with utter success. Or at least, I can't recall anyone complaining about failures and I'm sure John Harris would tell 'em to 'glass the inside in the instruction sheets if they did have problems.
The way you guys talk, the Middle Brazos makes the Colorado River in the Grand Canyon look like a sluggish old backwater bayou.