There is no graceful way to exit a kayak to a dock that is higher then your
deck. Basically you try to flop your upper body onto the platform and let your
legs go limp like they're paralyzed or something. You try to stay as balanced
in the boat as possible, while attempting to put as much weight as possible on
the dock.
In the ocean you can try to use to swell to make things easier. You wait
until the swell comes in rasing your boat up towards the dock, then throw as
much of your weight as possible onto the dock and let the boat fall off of you
as the swell subsides. Unfortunately this will probably not work where your
going.
As for lifting your boat onto the dock (or chickee, as the case may be) if
there are two of you then I would tie a line to each end of the boat and lift
it onto the platform. If it is only you then you might want to pack the
heaviest items where they can be quickly unloaded before attempting to lift the
boat onto the platform.
I wish I had some magical technique I could share with you for entering and
exiting a kayak from a platform, but the truth is that this is a clumsy
procedure which requires some dexterity. However it's not really all that
difficult to master, so don't lie awake at night worrying about it. Just be
sure that there is no one around with a camera at the time :-)

Good luck,

Scott
So.Cal.