I’ll post more planning info about Kruger as I have time and data connection.
Online bookings for all SA National Parks are here: https://www.sanparks.org/bookings/
A correction - bookings for Kruger NP August 2024 open Sep 1st.
When to go? Normally, the dry winter season (June to September) is the best for big game. The bush thins out improving visibility, and as many water sources dry up the concentration of game increases at the remaining water holes and rivers. The weather is also better - cooler, usually sunny with the sun lower in the sky (better for photography). But climate change is undermining this conventional wisdom. This winter (as last) there is still a lot of water around and thick bush, and yesterday it hit 36 C.
But late spring and summer has its attractions. Seasonal breeders are breeding - impala coordinate their births to saturate predation, so baby impala appear everywhere at some point in late Nov / early Dec. Migratory birds arrive, and birds are doing interesting things - courtship feeding and nest building, great for photography. And if you spend time in the right areas, you will still see plenty of predators.
Avoid school holidays. 2024 is 15th Jun - 8th Jul 8, and from 12th Dec.
Your probability of seeing cats doing anything other than sleep is much higher around dawn and dusk, so the best daily routine is to be out as soon as the gates open, drive until mid-morning, take a break and a nap during the middle of the day, then go out again for the last 2-3 hours before sunset. Only noobs and casual tourists with just a couple of days are out driving between 10am-2pm, except maybe on cool overcast days. This is why putting up with the seedy accommodation and aging infrastructure of the NP rest camps inside the park is really worth it - you are immediately in the middle of things as soon as the interior (rest camp) gates open. If you are staying in a lodge outside the park, you are wasting the best hours getting in through the external gates and reaching where you want to be. From November, the external gates also open an hour later than the internal rest camp gates, which is huge.
This leads to a significant consideration that most people (even locals) don’t pay adequate attention to. Gate opening times do change with the seasons, but the offset to sunrise/sunset is strangely inconsistent. Based on the 15th of each month, this is the sum in minutes (morning plus evening) of when you are allowed out, where a positive number is good - minutes before sunrise / after sunset:
Jun +55
Jul +47
Aug +46
Sep +4
Oct -10
Nov +40
Dec +19
So in Jun/Jul/Aug or in Nov, you are getting almost a full hour more prime leopard sighting time than in the worst month (October).
So all things considered, my favored periods are from mid-July after the winter school holidays ends, through to August; and November through the mid-December start of the summer school holidays.