Agree with Lauren. Just make sure you follow the signs to Page so you don't miss the 89A/89 split. Not sure about now, but when I went through in 2005, Page was the place to restock on groceries and fuel.
Remembering the trip, we left Trailer Village about 8am, stopped at the Tower for about an hour, stopped for another 1/2 hour at the dam, an hour in Page, and still had enough time after setting up at Ruby's campground to visit Bryce Canyon, stopping at most of the overlooks for a quick peak to orient ourselves for the net day. This was all towing a 35' FW. I don't drive fast as I like to look around.