It seems we are starting to get annual problems with pre-season training camps. I don't really understand the need to go away to places where essentially most of us would go on holiday too. We have a training set up so why not use it. That surely negates all the excuses and reasons not to go and should the odd player not be there, for whatever reason it is far easier monitored.
When we're at work we might occasionally all go to the pub, and sometimes one or two don't go, but there is no hue and cry over it as they will be back in work the next day. I know it's not exactly the same but for ease of management (and cost) would it not be better to stay in the country where you will play and also acclimatise to regular sessions. In Portugal they didn't even train in the afternoon probably due to the heat - they did morning and evening.
That also stopped the need to go out and taxis could run freely in the area without the fear of being nicked.