there's a regular car boot sale starting at Llandudno Football Club on 10th April, I might try it out at some stage it should attract the numbers. The Hotpoint one used to be good, not sure if it's still going though. The one in Rhyl opposite Sainsbury's is a big one but don't expect to get much for any items! Best one I've been to is at Chirk, and although I've never been, I believe the one at Mona is the best around.