We were there on the bike last August. Only made it to the North Rim so the only comparison to the south rim I can offer is from someone else who had visited both and preferred the north rim. I know you have to go north rim to see the angel's window pictured below. The dark ribbon you can see thru the large hole in the rock is the Colorado river.

The angle's window is at cape royal and was our favorite thing we saw at the Grand Canyon.
Camping near the Grand Canyon Lodge at the north rim but not sure how far in advance you have to have reservations. Just dug out my canyon guide and the north rim campground has a dump station only. NO HOOKUPS. Phone # is 877-444-6777. From what I'm seeing in the guide it may be tuff to find a campground in april that has full hook-ups. The north rim is at much higher elevation than the south rim so they have longer winters.
Kanab, Utah is centrally located to Bryce, Zion and Grand Canyons. Jacob's Lake is where I would stay if I ever go back. A lodge, store and great resteraunt. If you're gonna be in that part of the country, you definitely want to take in Zion and Bryce.
From Zion Canyon


From Bryce


From Monument Valley


From Bright Angel Point just below the lodge at the north rim of the Grand Canyon

I hope this helps. Maybe someone more familiar with the area, weather, etc. will chime in.
Mike, the phone # for Grand Canyon Lodge at the north rim is 877 386 4383. However, I was told they are booked one year in advance. Good luck to both of ya and have a great trip.
