I find this an interesting topic as I attended most of these festivals annually over a 10-year period when I lived in the U.K; occasionally as a featured performer. In the late 80s there were so many of them; Caister, Blackpool, Barton Hall, Morecambe, Sandford Park. Some folks even started creating their own little mini-festivals in off-months and it got to the point where you would pack up from one festival and head directly of to the other (where you would meet many of the same people from the week before).
I think it’s settled down to a more reasonable level in the U.K now but somebody raised an interesting question in this thread which is worth discussing; “why don’t we have this kind of thing in the U.S?”
Distance is certainly a part of it. In the U.K, no matter where you live, you can be in any other part of the country by car in the same day. The British phenomenon of “Holiday Camps” is also a big factor. Out of season holiday camps can provide an abundance of affordable accommodation in a setting where there are many superb amenities including one or more concert halls and theaters right on site. I apologize to non-Brit readers for whom the concept of holiday camps might be completely alien. Try searching the web for the history of “Butlins” or “Pontins” and it might give you a little more insight.
When I first came to the U.S, there were actually two national festivals in existence: AOAI in Florida and Asilomar in California. These were a little different from their U.K counterparts. Both were held in what can only be described as opulent surroundings: AOAI in a 4-star Marriott Hotel and Asilomar on the picturesque Northern California coast, and both with a price to match. Aside from the ambience of the venue, the American and U.K festivals were quite similar in nature. Both had formal evening concerts by visiting artists while retail exhibitors (each representing one manufacturer) and workshops were available throughout the day.
Most important of all, both the British and the American festivals were designated as ORGAN festivals. The focus was always on the two-manual organ while keyboards, if featured at-all, were usually seen as a portable alternative to the organ for an RV or spare room. This to me is where the big difference lies. As home organs began to loose popularity worldwide, the British festivals (reluctantly) adapted accordingly while the American festivals remained ORGAN festivals. I was actually one of the first performers to appear in concert at Caister (U.K) with just keyboards and no organ (a Gem WS2 and a Solton MS5). Even though I was using a midi pedalboard, the reception was very mixed and I remember that the most vocal group were the organ die-hards who raised quite a stink at the feedback forum at the end of that week. They wanted organ music, played on organs that looked like organs by organists!
By the time I left the U.K (1992), the festivals were already being referred to as “Keyboard Festivals” and more and more performers, young and old, were using single arranger keyboards and even daring to perform pop music! This transition was, in my opinion, what kept the U.K’s festival scene alive. Both of the American festivals fell apart due to lack of interest and neither is in existence today. Had the American festivals tried to appeal to a broader customer-base instead of focusing solely on organs, the story might be quite different. However, the chasm which separates piano/organ retailers from M.I retailers in the U.S.A continues to ensure that this could never happen (this could be a whole separate discussion!).
Hey, maybe we should start a SynthZone festival somewhere