Back in the eighties my wife, kids and myself had already made a few trips to the USA. We were on our way to the airport for another week in Florida when I realised that although my wife's and my visa were valid I had completely forgotten to check if my kids' visas were in order. They weren't. They had expired! Being a Saturday nothing could have been done until the Monday, with perhaps travel on the Tuesday. It just wasn't worth the hassle for the few days which would have remained. I'll skip on the details but there ensued some frantic reorganisation and we ended up making our first visit to the Algarve in Portugal. Loved it so much that it became one of our fairly regular destinations thereafter.