Please consider offering Abu Camp (http://www.abucamp.com) in Botswana. Abu offers a truly unique experience with elephant back safaris in the Okavango Delta, but the price and minimum stay requirement are pretty prohibitive even to luxury travellers. A package here would generate a lot of interest!
I've seen the auctions for Camp Jabulani, and it does look like a great deal -- though Camp Jabulani isn't a game-viewing experience in the same way as Abu's would be. The reserve is quite small and fenced in so you won't see animals the way you would in the Delta. But the actual experience of meeting the elephants up close would really be something!
If I went to Camp Jabulani I'd probably combine it with another camp with better game-viewing down in the Sabi Sands.