To stay just across the street from the park you give up some things. We've stayed at the Best Western Park place and the Carousel Inn and found them to be about a two star quality. The room we stayed in at Carousel was dreary, the carpet had seen better days, the a/c was loud and made the room muggy. The bed was OK. The window coverings are shutters and I'm not a huge fan of them. Also, no free wi-fi.
The Best Western is similar, the room was a bit larger and had a "sitting area" which was nice. Has free wi-fi but it wasn't working 3 of the 4 days we were there.
I must say I'm not a fan of motels that have outside doors, they seem to be noisier. One of our favorite hotels near the park is the Howard Johnson's, just seems cleaner than all the others and has inside doors.
We are thinking of trying the CCI for our next visit because everyone we know likes it, and I like the fact that it has its own shuttle.