We took a trip in September down to the canyon floor. Highly recommended.
B2. Our two kids got to sit in the front, when we dived over the rim, the grin on my sons face will remain with me forever.
It was a package tour, bus to the airport, fixed wing to Grand Canyon West, then Heli to the canyon floor then a short boat ride on the river.
Lunch was at the Indian run restaurant/cafe on the rim. Remarkably it is located right on the edge of the rim without barriers fences or ropes. Outdoor tables with an uninterrupted view, the edge just meters away.
We just made it back in time for a show, beware the time as the bus snakes around to all the hotels.
Mickjoebill