Our schools have an Open House/Meet the Teacher on the Friday before school starts on Monday.
This is when parents and students deliver school supplies, set up the child's desk, etc.
On day 1, some parents will walk children in. Our principal prefers that parents say goodbye at drop off. Many children like to get in their respective lines and go with the class to the lockers and then to class. There's always a couple of moms that just don't want to leave and have been asked to leave the classroom. I've subbed for 15 years and there are still some moms who hover, even at recess.
Within the first 2 weeks of school, each grade level has a parent meeting where curriculum and expectations are discussed.
Get a feel for what your child would like to do on day 1. After that, I suggest drop off.
Have a great year!!