Thanks for posting that, Chuckanut. Interesting read that I'll have to delve into more when I get a chance!
My folks had taken, normally, two 2 week vacation per year before they retired in 1987 (he at 62 Ma at 60). After retirement they planned on travelling roughly twice that amount, maybe a bit more plus some 2 or 3 day trips added to the mix. My Dad, especially, wanted to get in as much travelling as possible, as soon as possible in order to go most places that they wanted to before it got to the point where they couldn't travel anymore.
That worked out great for the folks for about the first 6 or 7 years after retirement. But then it got to the point that Dad couldn't travel anymore, except for maybe a 2 or 3 day trip somewhere nearby. And that wound down after about 1 1/2 to 2 years, when he couldn't go much of anywhere, except to a restaurant.
They didn't go berserk spending tons of money, but they did spend quite a bit more immediately after their retirement than down the road a few years. And because of their level-headed 'splurging', my Mom (who is 85) can still travel as she pleases. In fact now that I'm retired too (5 years next month), since she and I have very similar tastes, we travel quite a bit together, and either take turns paying for the trips, or as is more often the case, split the costs between us. We're currently on our annual 3 week Florida & Nashville trip, and I'm paying for all the meals & snacks and for all of the gas, while she is paying for all of our hotel & resort costs. Last year we did it just the opposite.
It works out well for me too, since I did most of my major traveling before I retired, and the traveling we do now is plenty enough for my desire!