Almost missed this since we've been on the boat since before Christmas. Mike and Connie run Crystal Cay Marine, and yes you can store your truck and trailer there. The address noted by Discovery is correct but the phone number I have is (941) 639-6603. I'm happy to provide logistical support during your visit. Seems your to have a great start to 2015 since your expected at the St.John's gathering in February as well. If I recall your story last year as to the name of your boat it would seems that all your days are Blue Days these days!
Charlotte Harbor is pretty much undeveloped and we prefer this area to either areas north or south. Given a choice I would explore to the south. Not much privacy to the north. As for Punta Gorda, we have two marinas, Fishermans Village which is a high activity facility with 3-4 restaurants and lots of small retail stores. My only issue with recommending them is their fixed docks. Granted our tides are only 2.5 feet but with a small boat like the C-Dory it can be a stretch getting on and off the boat at times, especially if you have a K9. Laishley Marina, where you can launch for free, has floating docks which are much more conducive to getting on and off the boat. At both locations you can get free bicycles to explore around town, have access to our extensive walking paths complete with exercise and bicycle repair stations. If you'd rather work out your arms there are a myriad of bars and restaurants, one of our favorites being the Celtic Ray just a short walk from the marina.
If you'd like, you can pm me and I'll provide my contact info.