They dont like to book more than 2 couples either. We tried to book 3 couples and they wernt keen, 4 of us in our 60,s but age never queried, we were just warned about noise with groups.
We have stayed at this site a couple of times and it is one of our favourites.
Tanya is very welcoming, friendly, and helpful as you can tell with her post relating to her website she would like they opportunity to put it right.
The problem is that other roudy groups spoil it for others and from talking to Tanya on one of our visits its a case of once bitten twice shy.