Can't help much - when i was there in the mid-90s it was the only 2 weeks of the year they'd hung up their boats for overhauling.
Interestingly, it was also 2 companies. Very possibly the same 2 as now. Looking for a day out, I chatted to both crews. Both were apologetic they couldn't accomodate us, but both warned us about how bad the other boat was.
No love lost there, I reckon.