Grand Canyon observing sites?

I am driving cross country last two weeks in july and will be bringing my completed - hopefully! - Dob (16" Royce conical). I am planning to visit the Grand Canyon and hope to take advantage of its spectacular skies. Since the Grand Canyon Star Party is over, I am wondering if anyone knows about the avaiability of observing sites.
Joe

Joe,

I participated on the South Rim last year and North Rim this year. On both locations, the official observing sites are condoned by the Park Service only for the duration of the events.
You can search my recent posts re: GCSP, I have some Google Earth pictures of the observing location attached.
Your best bet would be to call the GCSP organizers and ask for their recommendation for observing outside the GCSP window.
On the South Rim, the "lower observing field" would be desirable if you are allowed to observe there. On the North Rim, you would possibly get the best view on the Cape Royal parking lot but be prepared potentially for some discussion with the ranger that you are not camping but observing/measuring doubles/light pollution etc. I.e. no sleeping bags, stove, etc.
I did not want to spend the night there alone so returned back before full darkness (the road is very winded with lot of deer, you better plan for an all nighter), but will go there next year.
I continued through Utah national parks and would recommend specific site in Arches NP.