Hi Linofva,
my 2 cents, I would hunt late April, May.............bush is a little thicker (not good) but its not too cold (good) and the game is a little calmer. (VERY good)
On the ranch's in Limpopo and South Africa in general, the Hunting season starts during April (some ranch's have exemption but a lot still dont hunt all year) and by late season July; or August, september for ranch's with exemption the game can get a bit spooky............can be worked around, but my experience is the game is more relaxed earlier in the season.
use it dont use it.................as a South African, I try to hunt earlier ..................but while saying that, I am off again next week............so hold thumbs!