Hi Numpty.
As Cap'n Jack says, if you are there early not much in it, if you are after 9.30 definitely HNY. Other things to consider - if the walkways are working there is probably less walking to the main car park, but they don't always work. The walk to/from HNY is more flat, and of course takes you through the village which may or may not be a good thing depending on pester power!