We have done the same trip for £80 in the past so they think they can???? But, there were 3 of us on a normal weekend...getting the same for 18 on a bank holiday weekend is impossible....but try telling them that. They'll end up back in Lancaster or York ( even though it will cost them over £100 accom only plus paying for transport)

I'm leaving it up to them now....they're big boys

Thanks fopr all the suggestions folks.