I don't know about Clubcards etc but it is definitely worth it, I'm still going with my mum and grandma at 20 you don't have to spend money inside although there's a bakery, sweet shop, pub etc. Lovely area to have a picnic, small farm, buses and trams all around, a small mine which is fascinating to go round and various activities which don't cost anything.
Definitely worth it! We live not far from beamish and muller the backside off our ticket!
As someone else said, your ticket is valid for the year. Go at the start of your two weeks - you might want to go again!
It's excellent. It's a full day if you're doing it properly. Take a picnic. There are plenty of places to eat them and they're very happy for you to take your own food. Just leave enough room for the sweet shop. And the bakery. And the pub snacks. And the ice cream...
you don't have to spend money inside although there's a bakery, sweet shop, pub etc. Lovely area to have a picnic, small farm, buses and trams all around, a small mine which is fascinating to go round and various activities which don't cost anything.