Yeah I just toss everything on the beds/sofas and make it a point of building a tall tower of their stuff on the bed. Either that or tell them what i require moving while I bring in my stuff, just depends how busy i am that day.
I never really had any problems doing this. Never turn a job down for those reasons, gaining customers is too hard to turn down just for that reason.
Funnily enough I also turned down a job on Saturday. When I got there the lounge and hall way I was there to clean stank of cat pee, I mean really really stank! I don't know how the girl lived in that flat. Cream 80/20 covered in cat urine stains and there was also a moth infestation. Needless to say, she never told me any of this on the phone.