What's the problem with the lads Joshmacka? Don't they want a free holiday and a fantastic 9 days of fantastic fun and entertainment?
Show 'em the footage from last year on the prep DVD. It's only a fraction of the travelling circus, but that may be enough.
If they really don't want to go ... well, what can I say ... it'll be them who misses out, but that's no reason why you shouldn't go and miss out too.
You won't be alone, irrespective of whether your mates come or not, and I'm confident you'll have an absolute ball with stacks of new friends.
Life is too short to bother with idiots