All in all this episode is really weak. Bunk'd was never really good, the writing was inconsistent at times, some of the jokes were overplayed (yes, we get it, Ravi is weak and Emma isn't the brightest at times), but it generally was a decent coming-of-age-show with teen characters, some new and some we had seen growing up for six years, since the start of Jessie (seriously, if you want to realize how good the actors and especially Skai Jackson are, check S02E13 of Jessie).
The new season takes 1/3 to half (if you cound side characters) of the cast away and replaces them with three preteen elementary school characters (8-ish), all of them cliche and all annoying, and none of the three actors especially good at acting. This totally changes the focus of the show. Most of the original characters aren't even mentioned anymore, all we get to know is that Gladys took the ensurance money and didn't rebuild the camp (and seemingly scammed a bunch of parents by still accepting new campers and taking their money aswell, but that isn't mentioned). How Lou didn't realize that the camp wasn't rebuilt when she got the bus to pick up the kids is everybody's guess. All in all the writing is extremely sloppy and production quality not very good, they didn't even bother creating a new intro for the show.
I haven't seen the entire season yet, but I already know that the Ross siblings are leaving by the end of it, so I am not sure if I'll even bother watching (most of) season four.