You got a package? They have, in the past, generally sent out the packet for packages around 21 days out. It's been, in the past at least, by UPS. You could call Disney or your TA to see.
If there's early entrance to
Disneyland on the day you're going and you don't have access to it, do NOT enter Fantasyland at the start of the day. You will walk into a wall of people waiting for Peter Pan, Dumbo, etc.
If there's early entrance that day and you don't have access to it, hit the parts of the park that doesn't have early entrance. When we haven't wanted to take part in MM/EMH (whatever it's called LOL) we will enter and wait at rope drop for Adventureland, so we can hit Indy (assuming it's open for your trip! this is what we have done) and Jungle Cruise before their lines fill up.
Later in the day head to Fantasyland if it's on your list. Not around fireworks time, if there are fireworks that day, because they close FL for that.
So head to the areas that won't be filled for the hour before you can enter.