Hi Andrew,
As we only share vague detail, I'm happy to tell you that the group is made up of 13 men and 18 women with ages from early-40s through to mid-80s.
Addressing the anxiety demons - you aren't the first to feel this way and I can guarantee that you won't be the last. (I still get butterflies when I head off on a JY holiday). These feelings soon dissipate when you meet your fellow travellers.
The hotels have changed since I took this tour so I can't make a comment from personal experience, but we always aim to stay in nice hotels. It really easy to explore the three cities independently in your free time - I'm sure if you wanted it, some of your fellow travellers would join you on your adventures as many want to see similar sights. Telc is very pretty - some of our group paid a small fee to have a wonder around part of the Château grounds which was absolutely charming.
If you choose to book, I can also tell you that the provisional tour manager for this date is a gentleman called Philip Jones and he is due to fly out with the group from Heathrow, so he'd also be keeping an eye out for you at the airport. One comment I would say (and I say this to many of our travellers) is that if you go on to book, make sure that at the airport you have your Just You luggage labels on your case and hand luggage - these make it easy for our Airport Rep, tour manager and your fellow travellers spot you.
If there is anything I can help with, please let me know.
Kindest regards,
Julia