Are you thinking of doing all the resorts or perhaps only the "clusters" that are well served by Disney Transport so you avoid the "resort to park to resort" routine?
For example, easy enough to go to the Monorail complex resorts - CR, Poly, GF - get to the MK or TTC and then hop on the monorail - or from the WL take the bus to MK or boat to MK or boat to CR and then work your way around the loop (3 resorts)
From the TTC take the monorail to Epcot (I assume you are ok with a walk through Epcot) - walk through Epcot and out of the World Showcase side - from there you can see BC/YC/BCV and BWV/BWI along with the Swan and Dolphin (that's 7 resorts with one transport)
All the rest You could go to a park and then hop a bus to POR/POFQ - bag those 2 and then get on the boat to DTD and get off at SSR and then walk around there - go over to DTD, get a bus to OKW - that bags 4 in total
The rest are scattered and not easily reached by Disney Transport without backtracking (Pop, All Stars, CBR, CSR, AKL)
I think trying to get all in one day is going to be very hard unless you bail from time to time and grab a cab - as for doing it in one night - I just do not see it
Cheers
jaysue
Cheers
jaysue