Was last there in May 2012. Agree that the bikes are good enough that it’s not worth taking your own. You can’t take the Neilson bikes out on your own – minimum of two people – but it’s more fun in the guided groups anyway.
The road cycling is really good; I think the MTB not quite as good but still fun. The bigger road trips start pretty early in the morning so you get back with time to do lots of other stuff during the day. The MTB trips started later in the morning, when I was there at least, so tended to take a bit more of a bite out of other recreational time.
It’s a beautiful spot!