Hi Paul
Sounds like a wonderful honeymoon. I'm sure you're fiance is going to be extemely happy
I'm not so sure that combining Kruger and Victoria Falls (by car) is going to be the best way to allocate your time.
One thing that you may consider is flying to Livingstone (on the Zambian side of Vic falls) either at the beginning or end of your trip. You can look at SAA and Kulula for flights between Joburg and Livingstone, and of course making these flights from SA and paying in Rands should save you a lot of money (you may want to click on the SAA site for the South African link)
Your other option is to drive to Vic falls and go to another game park besides Kruger National Park. There are options in both Namibia and Botswana and Botswana is probably a better option. This would also allow you to go to the Okavango. Just remember to hire a car/ 4x4 that is able to cover the roads nicely - a car may suffice or a 4x4 may be necessary. You will need to sort out car permits to cover the various borders
Some other suggestions to look into - drive the wine farms and garden route from Cape Town
Go to Mozambique
Go to Swaziland
Visit St. Lucia (in northern KZN)
At the moment, SA Tourism has been focusing on the domestic market. You may want to google "Sho't Left" to see if you can find holiday suggestions and good local specials that fit your desires and budget.
It all depends on what you want but don't try and pack too much in. You will have a nicer honeymoon relaxing, spending your time and focusing on the places that you enjoy most.
Hopefully you also find other good suggestions from this notice board. Please let me know if you have any other specific follow-up questions
Looks like you have a wonderful holiday to look forward to