We enjoyed our two week stay in August exploring Snowdonia, Porthmadog, Harlech, Barmouth and the Llyn Peninsula.
Access to the site is via a residential road with cars parked outside properties on one side, which reduces the available width to a single carriageway. No arrivals before 1300hrs is rigidly applied due to the access and to reduce the risk of encountering caravans which are leaving as you are approaching. As others have noted, those that choose to ignore it and then have problems only have themselves to blame, particularly when there are plenty of large lay-bys on the main road approaching the site.
Overall the site is clean, well organised and there are plenty of service areas with water, bins, recycling and chemical disposal. There is only one toilet/amenities block, but it is split into two parts, which means one part is normally available when cleaning takes place. A special mention to the staff who were all cheerful, polite and helpful.
We chose a hard standing pitch around a cul-de-sac loop with a great view of the mountains. There are plenty of walks available directly from the site, including towards and around Trawsfynedd lake, partially along shared cycle network routes with gravel/slate chipped surfaces.
When we were visiting the weather was a mixed bag of wet and windy, interspersed with sunny periods. We found if you headed west to the coast and the Llyn Peninsula you actually found the drier, brighter and in some cases sunnier weather. We looked at the weather forecast and often found travelling a few miles provided nicer days out than getting soaking wet!