When I am at the beach I now take a small spray bottle of water which I spray on the lens filter when it gets salty from the spray. I also take an ordinary microfibre cloth (from supermarket) and wipe down the lens filter with this - dabbing at it rather than swiping. I also carry a lens cloth, but mostly the microfibre cloth works really well on its own. I always use filters at the beach. On a windy day I might have to soak my filter 4 or 5 times. The pull back hoods are a godsend when you're fiddling about doing this at the beach.
On the drive home I don't put my camera back in the bag. I wrap it in a blanket in the back of the car. I don't put wet things in my bag if I can help it.
When I get home I dab a wet piece of kitchen roll all over the camera and lens, or use the same microfibre cloth wet through. I do make it quite wet. I dry it off with a tea towel or another microfibre cloth and then leave it all open on the kitchen table for as long as I can. I take the filters off and wash and dry those. I leave any zooms open and lens covers/hoods/filters off.
My microfibre cloth and lens cloth get washed out after each jaunt and don't get used for anything other than my cameras and only ever have water on them.
A sporty chamois type towel is great for sucking the moisture off the surfaces too.
I know I've shared before, but a guy I knew used to take his Olympus in the shower with him after a day on the Cowes Week press boat. Olympus said they didn't recommend this when I told them