Brian,
Put #12.5 tee between #12 green and pond, there's plenty of room. Green would be at base of hill that holds back tees for #13. Perhaps 200 yards, gently uphill for a 2-4 iron, depending on the wind. Green could be fairly big, with at least 40-50 yards of fairway in front of green for run-ups.
Have you ever seen the pin on the left side of #15? I haven't (same for #17).
ahughes,
It's been almost 9 years since I've played Mid Pines, but I'd say they're fairly comparable, but that means I haven't played it since the renovation. Mid Pines is about 200 yards longer, I think.
TR's par 3's from tips are 152 (new one is ~164, wasn't open in Feb), 148, 178 (new tee is ~184, where my 6-iron was from), 152 (#14's back two tees, at 194 and 178, have been closed for years, I've never seen them open), and 142, though it plays much shorter, and green on right is shorter.