I would be much, much too cold in MO and AR quarries at this time of year, wearing what you describe. Here, I would require at least a 6mm farmer John and 6mm top (so, at least 12 mm across my torso), and a thick hood and thick booties and thick gloves/mitts.
Make sure your regulators can handle the cold water. They can freeze up, and free-flow, well before the ambient water temperature is near freezing. Use the standard "tricks" (e.g., do NOT simultaneously inhale and power inflate your BC).
Strip out of your wetsuit, and hang it up on a clothesline (but NOT in strong direct sunlight), to let it drain, during your long surface interval. Stay out of the wind, and make sure you dry off completely and warm up thoroughly.
Be Safe. Have fun.
rx7diver