You can read my experience from last year in the link given by Dyno.
One thing for sure, I think you'll enjoy it
As for the Orcadian Vintage, I was concidering it but my two fellow travelers found £250 a bit steep and maybe too "over the top" for their level of experience.
They didn't express wild protest, but I could see it in their faces as I aired the options befor booking.
As vikings they were more accepting of the "Viking Warrior" experience at £100.
I think the line up for the Orcadian was the '64, '68, '71, and '76, and maybe there were the 25 or 30 as a reference as well.
They served proper sized samples from the Viking series, and I believe they would do that from the Orcadian as well.
So in that matter you pay an amount about equal to the release price for the cl's you are getting.
Dashing out for one of the more expencive options probably pays of in added experience as well.
The schedule of the tours are limited as well as the number of participants.
As said, our tour was announced to be 1,5 hour but we leasurly followed James for almost 3.
You will also be served the samples in the calm of the Eunsons room with no hurry to finish.
In stark contrast to the basic tour we ran into; about 30 whimsicle people hearded through the main production before hurling down a 12YO at the reception.
If you got the time, Scapa is just across the bay and well worth a visit (just don't go with the same expectations ) Here as well, extended tour; twice the price but 4 times the value.