Hi Anth, why would you avoid alcohol don't you find a couple of drinks relaxes you making for a more enjoyable experience.
Well for me I would say
1. Alcohol makes you sleepy.
2. Alcohol makes you do or say daft stuff that you later regret.
3.Alcohol dampens your senses so you won't enjoy it as much.
4. Alcohol affects your memory - you are paying £500 plus. I want to remember what happened for a long time to come. Not it was so good I cannot remember a thing that happened.
The feeling of being freaky nervous goes away after 30mins. I am the most nervous person there is. so can say that with some certainty.
My overnighters I just had red bull type energy drinks. And my upcoming overnighter I will be doing the same.