Costs of days out - just generally stating a fact

Next weekend at Event City, they are doing the Ideal Homes Exhibition.  I thought great, have not been to one since I was a kid (like back in the 60s).  So I went on the internet to find out how much admission was - £15 EACH and no concessions only for kids, I think, under 13 get in free.  So have decided to go for 3 days at Clover Fields at Buxton for £46 for 2 nights - all in.  Now I see why I go caravanning - its cheaper to stay a long weekend than a few hours somewhere else