Tow Pro: Forester Towing query

I have a 2007 Subaru Forester X Auto, what is the best tow hitch I should use for this vehicle, and what sort of poptop van should I look for, is it possible to get a suitable van with a toilet, or will I have to rely on using ensuite sites or maybe a portable toilet, I am asking this question because my wife is unsteady on her feet and I do not want her to trying to find her way around toilet blocks at night.

Graeme, VIC