If I know that I will have the other kids with me, I usually do a 'dump and run' LOL. It's just too hard at the end of the party when they don't get a party bag - I've been there done that before and it aint pretty LOL. All the explaining in the world can't help the sadness of not scoring a party bag from the party you weren't invited to LOL. But if I know the host personally, I will let them know I will have the other kids and probably stay for a little while or for the whole party.