CL sites online booking & fully serviced

Gadgets

I have booked a few CL's now that have online availability checker and booking. 

It would be handy for members to be able to check availability (and pay a deposit) with more CL's. Some CL's are also serviced with water and grey waste along with EHU on each of the 5 pitches. This is the future and these CL's will get more bookings as
its just so easy for members to plan trips away. (Rather than waiting for a reply to voice message asking for availability only to be told full up then go through it all again.)

QUESTION

How can we know which CLs have online booking and serviced pitches?  This would also help CL owners to recoup investments if they get many more bookings by going online and service pitches,