We had to hire a caravan for 10 days before we left as the sale of our house went through quicker than expected, which actually made it easier. Hubby managed one last night down the pub with his friends, the kids had their friends over to the van for a day and went swimming etc, Hannah even managed a sleepover. As for me, my lovely friends threw me a surprise leaving bash at one of their houses which got very emotional once the wine kicked in lol! Didn't have anyone at the airport though as after all that we were completely wrung out emotionally and I don't think the kids could've taken and more.
The way I look at it is you're only a day away. OK, it's quite an expensive day, but it is just a day.
you'll get through it the way we all did. Just focus on the adventure ahead x