I went to the park on Saturday (July 10) and was extremely surprised at the lack of crowd. There was a chance of rain all day with more severe weather after park closing, so maybe that kept people away. It rained for maybe 30 minutes total during the day. I arrived when the park opened at 9:30 and was able to ride the big 6 (WF, PK, TNT, FITH, OR and TT) along with The Giant Swing multiple times each before noon. All rides had two-train operations except Powder Keg (one train). I'll never understand why that ride only runs one train when it has the capability to have three.
The longest line of the day was MRF. We got in line around 2:30 and after 90 minutes or so was able to ride. They were only loading a max of six people per boat, but there were at least 10 boats operating. The ride itself was great, except for the large amount spin we experienced coming off the elevator before plunging down the slide, the spin was super intense.
I've ridden Mystic River Falls three times now and have noticed a couple of issues with the operations of the ride... the load process is extremely slow. When there's a long Trailblazer pass line, like Saturday, it slows the general queue line significantly. I understand people pay for the pass to skip the line, but it really slowed the main line. Also, the boats often get stuck trying to re-enter the station and riders have to bounce and shake the boat to get it to move...there needs to be a solution for this. One last thing, the water cannons at the end of the ride that people can put quarters in to get riders extra wet are great and remind me of LR, but there's one that shot me right in the face when I didn't expect it and it didn't feel great. SO be on the lookout!
Overall, the only time the ride was closed was when it rained or lightning in the area. It doesn't quite make since why the ride closes when it rains with no lightning since it's a water ride, but was happy to not have any maintenance closures.
It was a great day at the park, especially for a Saturday in July. You can tell the park is hurting for workers, especially in food and beverage area. I was shocked that Buckshot's Skillet was closed all day. But, due to lower crowds, the lines for food were not bad. I highly recommend the Tasting Passport! Well worth it!