I think it would be easier to have lined all surfaces in the vehicle with plastic though. Waders really don't serve much of a purpose imo, because then the waders themselves get blood on them instead of a nice, light weigh pair of jeans, better suited for sneaking around while in a hurry, imo. Also.. they bought "special shoes" to wear (although, some waders do have "sock feet" so the idea of waders isn't out altogether.) But, waders make noise when you walk, too, so not very good at sneaking into homes and approaching bedrooms quietly. Trying to wash down waders between killings takes time and blood would be more likely to transfer to internal vehicle parts, I think... they'd be wet and dripping and splashing watered down blood everywhere. Then they have to be disposed of asap after the murders... it's just as easy (easier) to dispose of lightweight, dark-colored; probably black clothing. Both waders and clothing will have a lot of blood on it in any case. I think the killers would opt for ease of movement, light weight, dark clothing and whatever "special shoes" they wore. They had to know they were going to get blood all over themselves no matter what they wore, so why complicate everything with cumbersome, noisy waders that add extra weight to "carry" while playing commando men... and woman?
