there's loads there, it's a classic seaside town tourist trap. the first time i went we slept in my car parked up on the seafront for a couple of nights
it's easy enough to fly into amsterdam and then get a train, it's not far to walk from the station to the circuit vicinity. it's not a particularly vintage dtm circuit, if you wanted to get the absolute best of the dtm then do the norisring round instead but zandvoort is a really excellent circuit and town.