Agree on the above.
It's a size 4 or size 5 ball (based on age group), but under inflated by about a pound.
GK gloves will definitely be unuseable after the weekend. But necessary for a gk to wear them. Make sure your keeper knows that punts from the other keeper are considered indirect. So rather than make a leaping save for a ball that's coming out of the sky, just get out of the way. Lots of goals happen each year because the keeper nicks the ball with her pinky and it goes in. If she doesn't touch it, its a GK coming out.
I've not seen anyone wear goggles the last few years. My 9 year old is a part time keeper and also wears contacts. Shes done it the last 2 years without much of an issue. Bring an extra set of contacts and some saline just in case. (And the may weekend was incredibly windy. I dont think she had any issues).
As far as parking and getting around - USE UBER!!!! We stated at the Hyatt the last 3 years. They run a a shuttle, but it's not always convenient. The fields are about 3 miles from the Hyatt, so a bit of a walk if you are in a hurry. The parking lot will be a MESS by 10:00 am. If you have a game at 11:00 and are hoping to get to the lot at 10:00 am, you'll need to drop your player off and have her run to the field. You'll be lucky to make it there by the start of the game once you park.
Here's what I would do if I wasn't staying in HB. Park at Fashion Island in Newport Beach. Free parking. Call an Uber. It will cost less than $20 each way and will drop you off right near your field. They will have food trucks and beach snack shack right near the courts. The food court lines are long. If you have a long break between games, grab an Uber to Main Street/Pacific City for lunch.
Also - If you need to use the bathroom, don't wait until the last minute. The lines get long. I also make sure to bring a few rolls of toilet paper for the team. Near the end of the day, the bathrooms will be out of TP. That's not fun for anybody.
Some people will rope of football field (or futbol) sized areas for their team to congregate in. Don't be that person. There is plenty of beach around for everyone. You don't need to mark off your private island. Bring an EZ Up or 2, some beach chairs and plenty of water.
A word about staying at the Hyatt - The kid pool section looks like a Vegas nightclub at around 3pm on Saturday and stays that way until about 10:00 pm. It is wall-to-wall kids. On Saturday night, they illuminate the water slide and play music and have a laser light show. The kids love it. And the bar is open late for the adults. If you are feeling "spendy", not a bad idea to get a poolside cabana so that you have a home base.