Grand Canyon Trailer Village in the Park is great. You pick up the Park shuttle at their main gate and go wherever - including Hermit's Nest. All of this is included in the park entry price. Once you get the shuttles figured out, it's super simple. When you get to a view point, off, do your sightseeing for as long as you want, then get on another bus going the same way. The tours may be great but they do tend to 'push' you to move on from what I could see - they have a schedule to keep. Also, if you are lucky while in Trailer Village, you will have an elk or three wander by, grazing their way through. The park fills often as it is fairly inexpensive, is centered well in the park and is relatively easy walking to some areas if you choose instead of taking the shuttle. Also, a Golden Age pass (or whatever the NPS is offering now) takes the pain out of entrance fees which will be going up in 2016.
Our site at Trailer Village from our visit in September this year:
A 'visitor' just behind us - one of three that were there:
The shuttle from Trailer Village: