I nearly passed on going based on all the negative reviews. That would have been a mistake. We went on Monday May 2nd, and everything was flawless. We got there just after 10AM, and parked immediately in preferred parking. It really wasn't necessary, but saved the tram ride over. Parking everywhere was wide open. We paid for the unlimited quick queue, and didn't need to take advantage of it until about noon. There were no lines anywhere. It did become beneficial in the afternoon particularly with the water rides. For no obvious reason, the line for the Congo River Rapids was ridiculously slow. Wait w/out QQ was stated as 50 minutes, and we waited about 15.
Only one ride, the Scorpion, was shut due to mechanical issues. They opened it for a short time, and shut it again.
As for food, we ate at Zambia Smokehouse. We did not do the all day dining, but food was great and there were no lines. There were a lot of kiosks closed, but many were open. We used camelbacks for water because we didn't want to bother with lines or expensive water prices. The only downside with the backpack is that you have to put it in a locker for most rides. All day locker use was $8, and they were at the entrance of all the major rides. The process for using the locker takes a couple minutes longer than I think it should, but worked well overall. That said, they are in a small space so I can imagine it gets crazy if the park is busy.
As for Covid, most people wore masks. A couple staff members yelled a bit to get people to wear them properly, but in general staff and visitors were wearing them. There was, however, no social distancing.
I would highly recommend a visit on a weekday. I know this is not possible for a lot of families, but take the option if available.