Good luck to the workshop.
There is a thread I saw about how brilliant the W Clancey week in
Ireland is, which I used to go to and had a great time. What is the Willy Clancey week? Its main thing is a set of workshops to commemorate the man, for which there is a fee for learners to develop and gain confidence and get used to playing with others. The hundreds of sessions developed around them.
Many of the 'students' paying to attend workshops are impressive musicians, so I certainly wouldn't scoff at the idea of fees for lessons. There's always something else to learn and benefit from playing with different people.