You launch directly from the lower (lakeside) camping field at Park Foot. Its a shingle beach with the left side (as you look out towards the lake) dug deeper to allow bigger boats to launch.
No idea about the yacht club, never needed to use it even with a 26ft hardboat. Its about another mile down the very narrow access road.
If you are on one of the fields on the other side of the road (near the reception and club) its a bit of a trek to the water so I would suggest you ask for Aikbeck Field when you get there instead.
Camping - Aikbeck Field
Park Foot is a great place for sibbing, you really can launch without even getting your feet wet (by using the fence to walk along) but wellies will be fine.