The tub leashes worked pretty well at our shelter. They have to be pushed down very firmly on each of the suction cups.

I have an electric trimmer for paws. I would rather use it than scissors on a squirmmy dog. The sound isn't as loud as a regular clipper. Mostly it tickles their toes if you don't press gently.

I solved the dryer problem by bathing the dogs just before bed, but after "last call'. That way they can dry naturally while they sleep with no upsets to them or me. I use several towels for each. And I add a couple of towels to their beds. It takes less work and time on my part, too.