You will just love 4th of July week, crowded, but you already know that. The parks will be jumping and it makes for much more fun. A note on the water parks, because of the time of year, they also will be packed. Head out early for your favorite water park to obtain squatters rights. Special fireworks are in order, don't miss those. Your SSR main pool is special for the little ones, walk in entry. DW and I are staying at BCV for late June departing just 3 days before July4th, when I realized we were checking out just before the holiday, I was upset, I'll be missing all the 4th festivities,, we have been to WDW twice for the 4th and really enjoy it, not to mention all the 4th of July Pins I'll be missing out on.
Have a blast with your new friends.