Hi Mike1916We have just spent 5 days at Satara (and about 760km in that area). Maybe I can give you some info.
S100 has become very busy particularly for the afternoon drive. But early morning 4:30 drive is fine. But we did not see much - even on the night drive that took that route. First mornig we saw two male lions briefly (about 5kms before the Shibotwana water hole). Thereafter we only saw the one male every day in more or less thesame area - but sleeping (even on the night drive -sleeping) only to lift his head once in a while - wives probably feeding him well. Road was graded while we were there - good.

The
S41 between S100 turn off and the
S90 turn off realy was worth while. We had two lion sightings (near) and my longed for first Impala new born. Road not too bad ( my SO hates bad roads and was ok with this one).

I enjoyed the sightings on the
Trichard road (4 rhinos, ellies, and abundant game) and also not too bad - actually quite good particularly the last 10 kms as you get to the H1-3.The
H6 as always has plenty of game and we saw some very interesting hyhena activity.....

and some some other adorables.The
Sweni road was not good - very corrugated most of the way. But great sightings.

The
S36 not so good but from the
Ngwenyeni Dam very good - just graded.Didnt see much though - but it was a mid morning.Orpen road saw a great cheetah sighting near the t-junction with the
S39 which also has been recently graded.
S90 is also resonable As is the roads to the Timbavati picnic spot. The
S39 is one of my favourites and gave us a wonderfull lion sighting near Palm Springs also the road is fine.Wonderfull cheetah sighting on the
H1-3 near Mahena water hole but didnt get to see the great Tshokwane pride - only some left over bones.Saw more cheetahs near Lower Sabie (H10). Actually saw far more than mentioned over the 5 days but cant go into so much detail.But really it was very very hot but not busy at all. Can reccomend the wors and pap at Tshokwane for breakfast. Satara itself - fantastic as always!Good luck and hope you have a great time!