Gene,
Pull up the tide table for Ketchikan Alaska . You will see tidal differences of 12 to 20 feet. You will experience stronger currents as channels narrow. These are to be respected! We have run our Tom Cat to Alaska from Anacortes Wa. last year and 2006 covering most all of South East Ak.
Keep aware of the tide each day, if you can plan to run with the tide, you will really increase MPG.
I've done a lot of float plane flying in South Central Alaska, Prince William Sound, Cook inlet and Kachemak Bay. You don't see many planes setting dry in to-days world but in the 50s 60s and 70s It was common to land two hours before low tide, go Duck hunting, clamming or fishing, come back three hours later and wait for the tide to float the plane.
As has been stated, South East DOES NOT have many good sand bars or beaches but having said that we have seen great sand bar at low tide that had no rocks just nice flat sand.
Keep in mind, it is just about impossible to get aboard the TomCat with out using the stern ladder and I think difficult getting a 100 lb dog back on board if the boat is setting dry.
I agree that a dinghy is a great safety tool as well as a way of getting on shore while on the hook.
Good luck with your trip, it's a great adventure. You have a perfect boat for comfort and the ability to go into all the little hide away places.
Spend some time around Shearwater BC ( Bella Bella) there is a lot of great exploring, fishing, crabbing shrimp and wildlife. Lots of inside water if there is wind. Wonderful out side exploring in good weather.
Gary King