namibia campsite reservations and rental car sharing

Hey all,
I'm leaving Windhoek on the16th of April, I've got a rental car and am heading first to Sossusvlei, where i've got reservations at Sesriem for the 17th and 18th. Heading slowly north after this, i've got campsite reservations at Okakuejo and Namutoni in Etosha for the 24-27th. I'd also like to get to the Africat Foundation, but you have to book their entire campsite, which is rather expensive, so unless other people want to join up, will give that a miss. I'll follow up on Etosha by going to Kamanjab, hope to do a Himba tribe visit..maybe up to Epupa Falls if time/road conditions permit, and down through Damaraland to Swakopmund and back...anyone interested in sharing campsite costs/reservations (each site can hold up to 8 people) or car rental for any/part of the time would be more than welcome. Can reply here or to my private email, pedallerdave@hotmail.com Cheers, Dave