Being in Eastern NC can I assume your more of a Pirates fan than a Wolfpack fan?
Unfortunately I could not find anything at ECU. Not that there isn't anything mind you, its ust that I, could not find anything searching their web site. But at NCSU there is this -
http://www.bae.ncsu.edu/topic/waterharvesting/As for the showers, a lot would depend on if its 4 season or not. Obviously the NC Summer months might bring enjoyment from a cold shower where as an NC Winter would not. Uhm, other things would include weather or not the capture cistern can be in an place elevated enough for gravity feed low pressures or if would have to be pumped up to the shower head. Of course you will have to deal with the grey water as well.
http://www.safetycentral.com/porcamsolsho.htmlAlso, "Grey water can be recycled for home use."
http://www.deh.enr.state.nc.us/images/GraywaterFACTS-103007.pdfOther than maybe our pocket book, we are limited only by our imagination when wanting to overcome a diversity of real or imagined obstacles. Have you presented this challange to your "students" to see what they could come up with?
http://www.motherearthnews.com/http://www.longbrancheec.org/http://www.sustainingrain.com/http://www.thenaturalhome.com/