Is that good :-) . I wouldn't know. I live a loooooooong way from the Grand Canyon (other side of the world). Enjoy your trip. I'd love to be in Africa again.
p.s. Whatever you do in Tanzania, make sure you get to the Ngorngorro Crater. One of my favourite places in the world.
The Bright Angel Trail at Grand Canyon begins near the main visitor complex, at the start of the Hermit's Rest road, and follows the course of Garden Creek, reaching the Colorado after 9.5 miles and a descent of over 4,500 feet. starting at 6860 feet and ending at 2400 feet it is basically a "reverse mountain climb" ...
Here is what I got from the Hoopoe folks on the trip:
The hikes on the Walk on the Wildside itinerary vary with the hikes at West
Kilimanjaro extending to 13 kms which can be done in half or full day. The
terrain is mainly down hill through cattle grass lands and acacia woodlands.
Some parts tend to be rocky through cattle trails. On the crater rim walk
this is from point to pain and the first day stretches 15 - 16 kms on a full
day's hike and the next day on a 3 hour stretch. The terrain is relatively
flat which takes you through Maasai trails. On the hikes you will mostly
meet small game but in the Ngorongoro crater rim walk buffalo can be spotted
and that is why you will be accompanied by an armed ranger. The most part of
the itinerary will be in a vehicle during the game drives at West
Kilimanjaro, Tarangire, Lake Manyara, and Ngorongoro Crater & Serengeti
National Park. Charging batteries is available at West Kilimanjaro with
power supplied from a generator, Kikoti - solar power, Kirurumu - current
electricity, Ngorongoro Sopa and Serengeti Camp - generator.
Water will be supplied during the hikes and game drives and the supply track
will carry this at West Kilimanjaro and donkey in the Ngorongoro highlands.