Well, being so young, it is probably not aggression. It is a puppy and she is probably frightened!!! At 8 weeks, she barely knows what a collar is, yet alone something you're strapping over her muzzle. I would be frightened too. I would recommend a harness for now, until you can teach her some loose leash walking... or at least wait until she is a couple months older to use a halti.

You need to immediately begin to work on loose leash walking. Look up youtube videos, anything you can do, this is a very important thing to start young at. I haven't had problems with Delta because I started from Day 1. I would really recommend clicker training as it has done wonders for me and many others out there. It is the best training you can do.

When she begins to bite, there are a few things to do... immediately stop giving attention, if you are home, put in cage or other room for a few minutes. Or yelp like you've been hurt badly. Since 7-8 weeks are very important to develop bite inhibition (which you seem to know) you have to do it. Repetition will most likely be needed.

Oh, and I'm sure you know since you're counting down the days, but make sure puppy has 4 month shots before taking her to the dog park. You can get socialization by puppy classes (can start after their eight week shots) or by hanging out with dogs that you know are well taken care of. Dog Parks can be very bad experiences for puppies and it kills me when I see eight week old puppies at the park getting trampled and bullied horrendously.

Work with the tricks your puppy knows EVERY day... training builds a bond... it really does.