For the mummy wrap, go to Costco and buy a big bag of TP,,,,,, you can have 1 mummy and 2 wrappers, give each wrapper a roll of TP.... make sure you tell them it is NOT a time limit game, but the best looking mummy..... 3 kids per mummy, so that's a lot you get to involve...
For other games...
Best Zombie Walk
Best Frighting Scream
You can still trow in the basics like Limbo and Hula Hoops, just use Halloween music for them.
I have a 1 hour long Halloween sound effect CD that I play at the begining and during the night. I just have it on deck 3 and down about 2 or 3 and it;s behind everything most of the time.... real quiet, but they can hear it...