I have no idea whether you will be accepted to the schools you are waiting for, but you have already been accepted to some great schools…congrats! Hopefully your visits add some clarity.
My D went to UNC (biology) and had an amazing 4 years. You are very lucky to have this university for instate costs. Biology majors typically go to some type of grad school…that costs money. I would keep that in mind when making your decision.
Congrats on your acceptances!