A nice trick with this park is to build in each lake as you expand. When you finish up with the first lake, move to the second and fit as much as you can in the second lake; then move to the third, and so on. By not packing everything into one lake like the picture shown, you will avoid the guests complaining about it being too packed. Rapid expansion does help, try fitting a few gentle and thrill rides in each lake with a coaster or two where you can fit it. Players sometimes can delete the boat hire, but it shouldn't be necessary.