Trecco is a bungalow on the edge of Criccieth. It sleeps four, with two bedrooms and one bathroom. It's got a 4 Star rating, which means it's comfortable and well kitted out.
The main thing about it is the location. You can walk into Criccieth in a few minutes. There are shops, a few restaurants, and pubs. The beach and the castle are right there, too. You get a view of Cardigan Bay from the front. It's easy.
The bungalow itself is all on one level, so no stairs. There's parking right outside. Inside, it's got what you'd need: a washing machine, dishwasher, TV, and WiFi. The towels and bedding are included.
If you want to go further out, Porthmadog is about ten minutes' drive. That's where you can get the Ffestiniog Railway steam train. Portmeirion is a short drive the other way. For walks and bigger mountains, Snowdonia is about half an hour's drive inland.
Useful links for planning: Visit Wales North Wales and Snowdonia National Park.