View and book some of the best campsites in the Snowdonia National Park for your next outdoor camping adventure, you can choose dog-friendly coastal and mountain campsites in stunning locations throughout this area of North Wales. Camping is probably the most fun way to explore natures most stunning sites. Mount. Snowdon itself is easily accessible from many beautiful riverside and woodland campsites dotted around the National Park. Snowdonia has so much to offer with coastal campsites, and glamping sites to suit all.