Grand Canyon is about 60 miles north of Williams. If you stay in Williams and take the train to the Canyon you will arrive at the Canyon around noon. Then the train leaves to go back to Williams at about 3 PM. Unless you stay in a hotel at the Canyon overnight you do not have much time to see anything.
If you take your rig to the Canyon you can stay in Trailer Village. Full hookups and 50 AMP electric. You are close to a shuttle bus stop there and can get around any where in Grand Canyon Village by shuttle. Don't short change your stop at Grand Canyon by not staying there at Trailer Village.
The shuttle bus is on a short season right now. They travel the Village, Kaibab Trail-Yaki Point. Their full season starts March 1 and includes the west rim. Right now you can walk the trails on the west rim.
Get on the web site www.nps.gov/grca. Click on 2009 South Rim Guide-Winter. You will find all the info you need in The Guide.
You will be amazed at what you see. Do some Ranger programs. Very knowledgable people giving the programs and interesting.
Enjoy.
