You need a good generic camping list or park specific stuff?
They have opened up a TON more official hiking trails than they had in 2001 in the expanded portion of the park, and you can mountain bike quite a bit of them.
If you're going to have an adult beverage in public, be very discreet about it and I recommended transferring it to a drinking bottle something else just to be safe. The degree of enforcement varies by park officer and who the superintendent is.
If you are allowed to have a fire, best just to buy and bring wood. The ground is picked clean by "gatherers". You can do what my dad does and drive around Sunday evening or Monday morning after all the week-Enders leave and abandon their excess firewood, which he will collect. Hit or miss.
If the river is very low, it will be a zoo where it is pooled all day. I recommend fairly early morning or dinner time swims. We sometimes go down to the river in out of the way places at night to just relax in the water with some peace and quiet. The park rangers discourage this but it isn't technically prohibited. Again, if you are discreet they are usually watching for trouble makers.