I would also love to travel suddenly. When I do get to go somewhere it is usually planned at least a month in advance, depending on the duration.

sharky's family will plan something a month or so in advance but not iron out the details until the very last minute and it's incredibly frustrating for me. It stresses me out not having things be planned properly until the last minute and I don't know what's going on or who's doing what. So I just make sure when I plan stuff that I take more time and don't procrastinate on the details