When I first read Windy's 'garage forecourt' strategy
ROFL - I should perhaps point out that my prices are not constantly changing.
I take bookings anything between 18 months and 18 minutes before the holiday. During that period I carefully monitor the percentage of my target that I have booked by the end of each month. At certain points I review my pricing. If my bookings are coming in more significantly more quickly than I expect I would feel reasonably confident in changing the pricing structure (perhaps only for certain periods). The converse applies to except that i have a floor that I never go below.
An extreme example of the theory NOT being applied is somebody I know who is cock-a-hoop because he is already fully booked for Summer next year. I wouldn't be so happy! In his situation after the 3rd or 4th peak week went a year in advance I would have increased my prices. If that meant that by New Year I hadn't sold any more I could always reduce them again, but the chances are I would have made a lot more money for the rest of the weeks.
It's simple demand forecasting against a pattern. It's not rocket science and if you are not doing it you are missing a trick IMHO.
PS for absolute clarity I am NOT talking about changing the price upwards after someone has already enquired!