I run a girls team here in Sweden for girls born 2000. Been doing that since 2006 - fun most of the time but as people have said in earlier posts - some parents are just crazy. Me and my mate that trains with me have most problems with mums screaming at us and asks why their daughter isnt playing as much as she wants.... so we now have rules for the parents - but some mums still acts like mad mens.
And remember that football should be fun - thats our main mission really - to make these girls love the game.
Good luck mate !