It sounds like you had a good time...but you scared the bejesus out of your parents. Why not just call? When I had a curfew or was going somewhere, sometimes I'd just call even if they didn't ask. It helped my parents gain trust in me and let me go places that I might not normally have been able to go had they not had that built up trust.

And be careful who you're hanging out with...

I'm sure you've heard it all before so that's all I'm gonna say. Just jot it down as another stupid teenager thing but learn from your experience. It's the best advice I could give you.