I’ve not had a problem camping there, other than midges in the summer. If you use the ‘secure lockup’ be aware that it’s only secure when locked up, in the morning the old fella there often just unlocks it and leaves it. I always take a big heavy lock or keep the bike in the van with me. And take earplugs if you want to sleep well.
The Lodge is great but I think min of 2 nights and if you’re going solo a fair bit more expensive. Food there is great and a big Welsh breakfast just right for the first climb of the day.
Showers are better at the other site now, cleaner and with the price hike at GC worth it.
Bryn Bettws are advertising camping now, not been there, yet.