My daughter has always loved crafts and enjoyed sharing that love with her friends(even the ones who didn't really like to do crafts did so at her parties because it was an activity offered). We have always had the same types of games most we made up and they knew she would play them each year.
We have a sign in book for everyone to sign and jot a birthday wish in.
We put numbers under their chairs for them to pull off and pick a small wrapped prize many trades happen until everyone is sure they like their prize and then everyone opens them.
We fill a kid size water bottle with m&m's and have everyone guess how many are in it. The one closest get the bottle of m&m's.
We give everyone a plain bag to decorate with stickers and markers.
We pick easy crafts for them to make and then they can take everything home in the bag they decorated.
They draw on the driveway with sidewalk chalk and this year they made a really long hop scotch game!
They played DDR and other video games.
They love the oreo lick off! Many couldn't resist eating the cookie before the icing was gone.
We have played musical chairs, hola hoop contests, jump rope contests, relay races, bean bag toss and water ballon toss. It has been based on our party location which games we have played over the years.
I think your daughter is going to have fun with any of these games. I have always allowed my daughter to invite a few girls to sleep over and it was just kept between them. Everyone knows you can't possibly have all the girls sleep over. I would just make sure the sleep over guests are aware that everyone can't sleep over this time and it wouldn't be nice to point it out to those who couldn't stay this time.
I think your daughter will just enjoy having her family and friends around to celebrate her day!