Party Update, I survived!!
The party went really well, about 40-50 turned up, all pretty much well behaved. One girl was really drunk by 9pm and we later found an empty litre bottle of vodka where she had been sitting 
hesterton has hit the nail on the head!
There was indeed one or 2 girls sobbing at the end
Someone was sick in the sink in the loo (vodka girl)
One boy ended up covered in mud as he'd been outside looking for his phone 
The 2 lads I dropped home were extremely sober and sensible and thanked me for a lovely party 
DS had a fab time, had a fair few drinks and a couple of shots I wasn't counting but was 'with it' all evening
There is a ton of food left over, the savouries went well but not so much the sweet, cake anyone??? 
DH and I went to the club today to tidy up, found a few full pints of lager on the grass and some broken glass, but over all no damage
It would appear to have been a success 