I agree with everything the others said. Definitely leave it all outside and DONT be there when he collects it. DO take photos and document document document!! Getting him to sign he has collected it would be good too as that way he cant come up with any curve balls later on (when his new girlfriend has wisened up and kicked him to the curb).
I havent been in this situation but I have just been through a crappy tenanting situation and wish to god I had taken PHOTOS!!!
It would be even better if you could drop all the stuff off at a neutral location...totally worth the hireage of a trailer...that way you can have your house to yourself.
Wash your hands of the bastard......just a bummer you couldnt have set fire to it all....that would probably feel good, I imagine