I forgot my brothers boat!!! He's gonna kill me for not recommending it.
Newport 17 (can be found all over the place)... swing keel... draws like 12 inches up, like 4.5 feet down. Its a lightly laid up boat, but we've sailed it in 25 knot winds (obviously NOT the picture below).
We sailed his newport 17 on the Albemarle sound, I know pictures or it didn't happen... well here you go.
For the record, we used a public ramp, then under a bridge, with clearance, 5', no seriously 5' clearance (we were laying down in the cockpit, as the cabin cleared the bridge by about 1 foot. We motored probably 1/4 mile to the bridge with the mast down, then raised the mast, in the channel, then on with the sails, and sailing/sailing at that point. This picture was taken after we stopped at the house we were staying at, for "provisions" for the day (yep beer and sammiches). So the mast down is not a difficult problem to deal with honestly, you just need calm waters to do it ON the water.
For the record, water depth where we launched was so shallow his outboard (thankfully air cooled) was chopping up the surface and spraying water.
The dock in this picture had a water level of about 18 inches. We used a 5foot bamboo stick to measure depth to determine when we could lower the keel