If there's any issues with sites, Cedar Hill State Park is on the other side of the lake. I honestly don't know what volume is when the season is full on.
Loyd Park is $10 to enter, and $18 to camp, and Cedar Hill is $5 to enter, and $20 to camp, so just a couple o bucks different.
I read Cedar Hill is a little stricter on the rules such as quiet time and how many cars you can park at a site, but that can be a benefit if you are wanting peace, a teardrop gathering can get loud depending on who is there.
Both parks are nice and both are right off the freeway. I don't know if I'll be able to go, but I'll keep my eye on the thread, I am going to a couple of concerts this month which is taking some fundage.