At this time, everyone is apparently planning to drive from San Diego County to the Grand Canyon. We'll plan on meeting in advance to exchange car keys and overnight bags. (You'll want to leave one bag behind when you hike across the canyon and have another one waiting for you on the other side.)
Our North Rim hotel is the Crazy Jug Motel in Fredonia. The best route is Route 9 to Route 59 to Route 389, rather than Route 9 to Route 89 to Alt Route 89.
Crazy Jug Motel
465 S Main
Fredonia AZ, 86022
Our South Rim hotel is the Yavapai Lodge inside the park
928-638-2631 (main switchboard)
Inside the Park near the Visitor Center
The Crazy Jug is about 70 miles north of the North Kaibab trailhead, but it is on the way to everywhere, so there are no miles lost. Plan on an hour and a half from hotel to trailhead. So a 6:00 AM start means a 4:30 departure from the hotel.
The parking lot at the North Kaibab trailhead is not too large and it's easy to find.
The Yavapai Lodge is near the Vistor Center in the main part of the park (near the entrance, not in the old village). It is less than a mile from the hotel to the shuttle bus stop for the North Kaibab trailhead. (There is no parking or vehicle access to that trailhead.)
The group leaving the South Rim will park the car near the Bright Angel trailhead. The group coming up that afternoon can freely choose either trail for the ascent, but the last bus from the North Kaibab trailhead back to the village is at 8:30 PM on May 21. If you come up the South Kaibab trail and miss that bus, then it's an extra two miles back to the village (but not uphill).
The map of the South Rim requires some explanation. The Bright Angel Trailhead is just off the left side of the map. You can just see the edge of the hiker symbol next to Bright Angel Lodge. The Park Service map shows the parking near Bright Angel Lodge, somewhat east of the trailhead. That matches my recollection, but I was pretty low on blood sugar at the time... The blue route is the village bus with blue circles representing the stops. The green route is the Kaibab Trail Bus Route with green circles representing the stops. The following information is from the South Rim Transportation page provided by the Park Service.
Kaibab Trail Route
Buses provide transportation between Canyon View Information Plaza, South Kaibab Trailhead, and Yaki Point. This is the shortest scenic route and the only access to Yaki Point. (30 Minutes Round Trip, without getting off the bus)
This bus runs every 30 minutes from one hour before sunrise until 6:30 AM, then every 15 minutes from 6:30 AM until one hour after sunset.
Buses provide transportation between Grand Canyon Village (where the Bright Angel trailhead is located) and the Visitor Center and Market Plaza. This bus links with the Kaibab Trail Route at the Canyon View Information Plaza. (60 Minutes Round Trip, without getting off the bus)
In May, this bus runs every 30 minutes from one hour before sunrise to 6:30 AM, then every 15 minutes from 6:30 AM to 7:30 PM, and every 30 minutes from 7:30 PM to 10:00 PM.
This bus runs only a few times per day, but it may be a very useful service for us. It runs from the Bright Angel Lodge to the Kaibab Trailhead at 5 AM, 6 AM and 7 AM in May. Since we will want to leave the south-rim vehicle at the Bright Angel Trailhead, this is a very convenient bus if someone wants to hike down the South Kaibab Trail. The earliest this bus can get you to the trailhead is about 5:25 AM, whereas the Kaibab Trail Route can get you there before sunrise.
You can view the park service descriptions and all of the original maps all of the original maps at the U.S. Park Service, and there are other useful maps of the south rim. These are .pdf files requiring at least version 5 of the Adobe Acrobat Reader. The South Rim Transportation page has more information on parking and shuttles.