In 2011 Penny and I were considering the loop so we joined AGLCA and attended the fall convention of the "loopers" which is held in October at George Rogers State Park on the Tennessee River in Alabama. We lived on Two Bears in the campground and after the convention joined some loopers cruising up the Tennessee River to Chattanooga, TN and back over two weeks. For us it was a great introduction to eastern boating, which has some real differences from our Puget Sound experiences. The convention provided lots of good advice about the southern half of the loop. We talked to a lot of boaters, those like us "planning", those part way thru the loop, and some gold and platinum "loopers." We learned about places that people wanted to return to or enjoyed the most included the Eire Canal, the Canadian Historic Canals, Georgan Bay and the Tennessee River. Where to overwinter in Florida was a major topic/ discussion item. Lots of mixed info about the Alantic Intercoastal, but that might have been because many came from there and it was "home" to them.
We decided that doing the loop at one time as a goal did not interest us, but we listened to what they said about places they had visited and wanted to re-visit. They were interested in us with a trailerable boat to avoid the many days and hours plodding along in the dull sections. We made some good friends and we still belong and receive the daily digest of the AGLCA forum. It's fun to spot a name from an encounter years ago.
After that trip, then a summer /fall loop trip to the Eire Canal/ Cape Hatteras, then the Apalachicola gathering in '12, and this year on the Mississippi River & Cumberland Rivers we have used Active Captain for most information. My chart plotter is Garmin and I have an I-pad with two different chart programs. The Garmin charts let me down this summer on the upper Mississiippi River when they did not show the wing dams. I had purchased "Garmin Lakes and Rivers" chip in 2012 and it was supposed to include all the inland waters in the US. I jumped the Garmin rep about that at the boat show last week, asking "what went wrong." We went and looked at the Garmin charts in the MFD in the show display. Guess what= they had the wing dams. His explanation was that as plotters hold more memory the special chips they sell can hold more and my 4 year old ones didn't cover that area, but today they do. Not very comforting.
There are lots of local area interest guide books. The big planning guide we have found useful is "Quimby's" (Google it) which covers most of the waterways in the eastern half of the country. It is mostly a listing of marinas. Be careful, they update it yearly, but if they info they send out is not returned they just reprint it again without checking to see if the company has changed hands or gone out of business. It is $40, we bought a 2 yr old one for half price from some locals, and it got us the basic info.
I think another way to say it is that all the guide books are great at home, but you can't carry them all in a C-Dory, so do some planning and depend on Active Captain when on the water. It is certainly the most up to date info you can get.
Chuck