Hi Joolz,
I did this holiday last year (June) and there was 18 of us and it was a very mixed bag of ages.
7 men - (1 in 40's, 2 in 50's, 1 in 60's & 3 in 70's)
11 Ladies - (2 in 20's, 1 in 30's, 1 in 40's, 2 in 50's, 4 in 60's & 1 in 70's).
Some are my estimates but hope its a help.
Mick