The fact that there are so many other prints and only one print by Danielle makes it harder for me to accept she played there. Especially playing there long enough to loose several hairs and some blood.
I thought that's what you might have been getting at, but, as I said before, the "pizza gang (four, non resident adults)" were nearly the last visitor's to be in the VD home, prior to print dusting and there was not a trace of any of those four, anywhere in the house. Also, while DW's MH had many prints lifted from it, none of his own showed up in the area that was dusted. We know he was in his MH that weekend and because of all of the other prints lifted, we know he didn't wipe the surfaces clean of prints.
It just goes to show how many prints are smeared to the point of being unusable for identification purposes. It's certainly possible that there could have been other, smeared, prints of Danielle, that couldn't be identified.
Not to say it's not possible, but frankly, I find it easier to accept that she could have ventured into the MH on a previous occasion, than to imagine that, if DW had her held captive there, that he would have left her hands free to be touching anything. That's JMO though and it's apparent that you already have a well established opinion of your own.