Some years ago, Jane organised a bash at a youth hostel* slap bang in the middle of the Surrey Hills near Ranmoor Common. She took the hostel over from the Friday evening to the Monday morning I think. I stayed one night and took my bike on a train. I've forgotten which station I went to on the Saturday (early morning - I arrived around 9am I think and had breakfast with those who had overnighted). It may have been Westhumble.
On the return on the Sunday I was dogged by the usual replacement bus curse and whichever station I went to involved dragging my bike up a long flight of steps to platform level. It will be worth checking on the train service that weekend, depending upon the days we want to stay. I'm assuming at least Friday and Saturday evenings.
*Tanner's Hatch