To help other cyclists I tried to review my maps yesterday remembering as much as possible which might help cyclists.
These details are based on map sections I got from Adventure cycling around April 2012 (I got a mix of older and newer maps).
Map 6: In Bitter Springs, just north of intersection there is a new church with a covered shelter. Maybe cyclists can use the shelter. It was gated. Maybe someone can ask?
Map 9: The camping is located at the gas station next to the 89/64 intersection. It was 10 dollars and you need to ask at the gas station. Gas station is not called Chevron anymore. It is very primitive, toilets only possible during gas station opening times.
Map 10: Desert View has a grocery store, but it is located beyond the parking area very far away and cannot be seen from road/parking area. You need to go very far into the area with small paths.
Map 10: Tusayan is extremely touristic and so are the prices for food in town.
Map 17: Congress also has a brand new gas station and large grocery store (dollar general/family dollar or something like that).
Map 18: Somewhere south of Whittmann there is a large service/gas station open 24h (not shown on map). Supposedly Morristown and Whitmann themselves do not have any grocerystores - I asked locals before doing that section.
US60 from Wickenburg to Phoenix is a wide dual carriage highway with a wide shoulder. Very good surface and pleasant riding.