Udawalawe
The elephant park between the hills and Yala. More dependable for herds than for a cat.
Udawalawe is the open park on the way from Ella down to the south. Elephants are the reason to stop. The published wildlife sample gives it one night and one half-day jeep, in a standard room or similar, before the Yala drive the next day.
It is a better use of a day than a second jeep in Yala if what you want is elephants rather than a second chance at a leopard. We still do not guarantee a herd at the hour you happen to be out.