Actually, I was NOT able to check in the Mokoro Lodge because of fully booked even though I had already paid through Expedia.
A staff of Mokoro Lodge called many Lodges in Maun, and they arranged another accommodation, but it was a backpackers lodge. There was no private bathroom, no towel, no TV, no air-conditioner... Furthermore, it was room in plastic tent, and it was very cold and I had a cold. I cannot understand how the Expedia system work?