Pete, can I suggest you choose somewhere else to launch, like Swanage.
Kimmeridge has two slips, a small steep one south of the cottages which you will need 4 x 4 at low water, but I seem to remember some low posts in the ground which we had to drive over. The larger slip in the NE corner of the bay is good at high water but dries to boulders. Attached pic was taken at high water.
However, Kimmeridge is a very popular site with the tourists and baby divers (there is an underwater nature trail around the bay), so potentially divers could surface anywhere. Both lower and higher car park fills quickly and you have to pay a toll to drive to Kimmeridge. You will have to be early to park in the lower car park. Lulworth Ranges unlikely to firing on a weekend btw, Armies do like to have time off too
Instead use the slip at Swanage, 2 car parks on site and although its still a steep slip its concrete all the way. Drive through the town, along the sea front and just before the pier turn up the short steep hill and into the car park. Though the first car park into the second and the slip starts at the far end.
By all means visit Kimmeridge and Lulworth Cove but by rib would be easier.
Originally Posted by Peter J
Can you drive through the "door" at Durdle Door? Peter.
don't know, perhaps you could take a look if its calm, there are two rocks in the area called something like the cow and the calf keep a sharp lookout. However stair hole is definately mask and fins only