We camped at the big site Korana, they have a free bus ar 9 am to the park they are big coaches so don't worry about getting left behind.
These go to entrance 1. You can get picked up from entrance 2 and 1 at 5pm
We walked route C and got to entrance 2 by 3pm.
The camp site has variable Wi-Fi closer to reception seemed to be best if that your thing.