I beckon to Ye (Single Player) players...

[Morkilus]

vfb said:
It's very tempting, but if I know I'll be going on holiday for a month in the summer, is it better not to join?

I wouldn't let that stop you, since it's usually not too hard to find replacements/subs. Though if everyone is playing in the game, it might be hard to find someone that's not already playing! Another option you might have is to later become a replacement for a player that has to drop out, though that has its obvious disadvantages.