My question (
which the OP need not answer on a public forum) is why your parents would not attend. If they are not able to due to financial reasons, health reasons, etc., then fully agree that you will be able to "get away from USNA" with your sponsors or family of a roommate, etc. Trust those of us who've been there, you absolutely will want to get off the yard, eat "real" food, use social media, etc. PPW is a "reward" for plebes as much as an opportunity for parents.
If there are different concerns, such as your parents aren't supportive of your attending a SA, the above is still true. Perhaps invite them and let them make their own decisions.
If there's some reason you don't think they should come or don't want them to come, I still lean toward inviting them with the caveat that you know your parents better than anyone else.
Finally, the attendees need not be your parents, despite the term PPW. Could be grandparents, favorite aunt or uncle, close family friends, etc. Could even be a BF/GF. There may be limits on whether you can ride in a car with someone who's not a relative (someone else would need to weigh in), but you certainly can do things out in town with anyone you choose.
I STILL remember PPW more than 42 years ago.
Figure out whether there's anyone in your life with whom you'd enjoy spending the time at PPW. If no one, then go the sponsor/friend's family approach.