For me its just financial to be honest, £150 before my two have paid (sorry, I have paid) for different workshops, plus food, beer, and the like means maybe £300 for me to pay out, thats a lot of dosh when I have other summer trips arranged (Wales, Wales, Nottingham and Spain)
My son and I had a fantastic time last year, and if I can stretch to it, he and I plus my daughter this time will enjoy it all again this year. I met some great people last year, but a word of warning to newbies,,,,,,,,,,,, take some beer, this lot drink like fish