We were at SSR last July 4th and we spent the day at the waterpark. When we came back that afternoon, they were making red white or blue ice cream out by the pool ($2) and having a pool party with bingo ($1), games and trivia at High Rock Springs.
While we were making ice cream, a lady was telling me that earlier they had gone over to OKW where they had a really cute parade and activities, so she spent part of her day over there and then came back to SSR for the afternoon activities.
Later that evening at the Congress Park pool, SSR put on a pool party and fireworks viewing for the DTD fireworks. They had a DJ, and contests and piped in the music for the fireworks. Very similar for what they do for NYE also but earlier, I believe the fireworks were at 9pm or 10pm.
We had a good time. We are more into the relaxation, avoid crowds mode, so we dont do the parks during peak times.
HTH!