The major safari lodge chains are (in no particular order):

1. Wilderness Safaris - http://www.wilderness-safaris.com/index.jsp
2. Desert & Delta - http://www.desertdelta.com/
3. &Beyond - http://www.andbeyond.com/
4. Kwando - http://www.kwando.co.za/
5. Sanctuary Lodge - http://www.sanctuaryretreats.com/lodges/
6. Orient Express - orient-express-safaris.co.za/web/ogam/ogam_a…
7. Ker & Downey - http://www.kerdowneybotswana.com/
8. Footsteps in Africa - http://www.footsteps-in-africa.com/

Thanks Craig,
I'm wondering if any of these also book,or are affiliated with "hunting" safaris.