I think you should just go by yourself if you want to. Why do you say "my parents won't let me go"? how are they stopping you? maybe you think it's too much trouble to go against them?
I was in a similar situation, where my parents wouldn't allow me to go out, I had to come straight home after school and study, couldn't go to peoples' houses, and I had to budget the amount of times I go out. My mom always nagged about which guys I talked to even if it's a small friendly chat, to the point where I stopped contact with guys just to avoid her. My dad had access to all my accounts and passwords etc... it was very stressful. I eventually cracked under pressure and really blew up at them in college.
The thing is to realize that your parents will adjust
their behaviors if you put your foot down. To some extent, I thought that I was being a good child by not throwing a huge fuss like some other kids... I thought I was being considerate... but it was more like spoiling my parents and allowing them to continue doing whatever they want. I was also anxious about what my parents will do or feel if I don't agree to go along with their demands, but really they could do nothing in the end. Yes, there was a period of yelling, threatening, etc... but they eventually realized that I'm not gonna budge, and had to accept that. Having my own money and choosing to live on my own also helped in the process.
Now, I assume your parents were like mine, and they nag a lot and argue with you forever until you cave... but seriously just ignore them and don't budge your position. It's a lot of work to break away at first. Yes, they are good parents, but you need room to grow, and you don't need to consult/notify them for everything now that you're an adult. Believe in yourself and that you can make the right decisions.