If you mean the badge you print off on a piece of paper then sure, put it in the window.
Mooring: Get the guy that does your trial run to show you how to tie the boat (that's partly what he's there for) after that it's just practice. If you are staying north the tides aren't really a problem as the difference in water heights between high and low tide are fairly small. The nearer you get to Yarmouth the greater they are.
As someone has said, download the 'Aweigh' app, that will tell you which way the tides is going wherever you are.
And enjoy :)