LongingForORD, the S3 bus travels along Rivonia Road and past the Hilton. Unfortunately the stops are far apart. The first stop is the nearest and although it gets you about 600 metres closer, there are still about another 300 metres to the Hilton. No problem at all in fair weather and without cumbersome luggage.
In fact the whole distance is less than 1 kilometre so eminently walkable in good conditions. Otherwise a metered taxi would get you there in less than 5 minutes.