I don't really have any advice on bathing, Thumper hates it too. He also hates the blow dryer so i can't get him totally dry. But he loves it when i warm a towel in the dryer and after the bath i put it around him and just hold him for a while. Last night he fell asleep like that.
I like the thing about putting a rubber ducky in the tub with him and giving him treats. I'm going to try that!