Help! My (26X) parents (58F 51M) are using my community beach and getting into shenanigans

Hi Dating.mobi. I bought my first home a year and a half ago in a long-standing community. There's no HOA but homeowners can pay a small due to the community association for access to special events etc.
All community members have access to the community beach. The stated rules include no alcohol and all beachgoers must be accompanied by a community member.
I took my parents to the community beach a few times last summer because I actually didn't know about it when I first moved in. My parents have helped me out with my house (screening in my porch, helped me move in and paint, etc.) but I am financially independent from them. I have a few kayaks to use at the beach and I've taken my parents this year. They bought inflatable kayaks for themselves.
This summer my parents have been coming over largely unannounced (maybe a text on the way over) to my house every weekend to go kayaking off my community beach. I told them they should park on the street but they're afraid of being sideswiped so they park in my driveway and block my partner in.
Yesterday they came over and brought coolers of alcohol (in the past they've had a few beers while floating out in the water). I actually didn't see them at all, I was out running errands when they came over. Around 6pm I got a call from my mom asking me to help her pack stuff in the car (we would drive to the beach together from my house). I was home watching a movie with my partner. I told her it would be inconvenient and she said my dad was completely wasted and fell in the water, she had to rescue him and row them both back to the beach (!). He had been drinking vodka orange juice.
On the way to the beach my mom was joking around and acting like what happened was funny. I told her that the rules say no alcohol and she said "There's people drinking there all the time." Which could be true but I personally haven't seen, but they've been to the beach every weekend and I've only been once this season so who knows! :)
When we got to the beach my dad was totally incoherent and could barely stumble back to the car. He threw up in the grass and was shouting loudly asking, "Whose party did I drink the alcohol for? Whose alcohol was that?" etc. I told him he went kayaking with my mom and he shouted "That's so ****ed up!" Lmao. I guess I could mention that my parents are divorced.
It was an ordeal to get him back in the car, but finally we got everything packed up and my mom drove me back to my house and she left from there. No apologies or anything.
I tried to look at the community center website to see if they have any stated actions against breaking the rules and couldn't find anything for my community, but I did see on other local community websites that rule breaking could result in loss of privileges.
Am I right to feel upset about this or am I being uptight? I personally don't feel that my parents should be using my beach access without me and without asking first. Certainly not every weekend, and absolutely not getting drunk enough to disrupt the neighborhood. But I second guess myself, which my partner says is because my mom is a narcissist. Does anyone have experience with this? How should I handle this situation without ruining my relationship with my parents?
Tl;dr - Parents are using my community beach access without my permission, breaking stated rules, and getting drunk and disruptive. I want to know how to set boundaries with them without ruining our relationship.


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