Most of the hotels in Grand Canyon park are operated by the Park Service. If you stay in Grand Canyon City, I believe there are a few name brand motels (Best Western, Holiday Inn Express), but I can't remember. Depending on when you go, you may have to park your car and take the bus to the rim. There are a lot of stops, so you can see tons. If you can get up to see the sun rise and stay for the sun set, it is amazing. The lodges inside the park are beautiful, but the canyon itself, there is no real way to describe it. It is so big, and just awe inspiring.
There is an IMAX in GCC, it used to show the story of the exploration of the canyon, it is a good history. There isn't anything else there, a few shops in the park, the people who live there don't want to see the natural beauty ruined by development. If you make reservations well ahead of time, (think Cindy's, but 6 months to a year out) you can ride a mule to the bottom. If you are not an experienced hiker, don't try to hike the canyon, it is a full day down and back, and many people have to be rescued, because they don't realize how hard it is. In the summer, it is hotter at the bottom, up to 110 or more, and you are at about 4000 feet at the top. It is a really beautiful place, about 5 hours drive from Phoenix. A lot of people do helicopter toursa either from GCC or Vegas. THe train that goes to the canyon starts in Williams, AZ. You stay in WIlliams overnight at a historic hotel, then go the next day. They have varying packages, do a search on the WEB, you should be able to find some info. If you would like, you can PM me your address, I can get a few tourist brocures from the rack at work and mail them to you.
I have lived here since 1995, and went there only once, after Thanksgiving while the South Rim was still open, it was cold, and we saw a lot of mule deer and few other people. I need to drag DH there, he still hasn't seen it.