we went to Inverdoon on our trip and absolutely loved it. We only did the one day safari which we booked upon arrival in SA as we had our 3 year old with us.
We did the trip the day after our initial appt as we didn't want to risk getting caught out of town if the EPU was brought forward or delayed. As quite a few ladies will agree I'm sure, I wouldn't book the trip for after transfer as the drive around the safari park is very bumpy and you don't want to spend the whole trip worrying about how your embryo is sticking.
Id still recommend going, but definitely before transfer!