Good light on Spider Rock, Tony! Even from the rim, CdC/CdM is beyond compare!
My several trips to CdC are way out of date regarding guides, but weather it was a several-vehicle group, a couple of 4x4s or my last with just my 4x4, it was a matter of checking in at the HQ to find out the latest conditions, rates and procedures for getting your guide.
Both CdC and CdM are spectacular with the cultural resources, rock art and landscapes!
Each time, we warned the guides we were photographers and not going on a 3-hour tour and probably staying until dark. One trip more than 20 years ago with my group of photographers and multiple 4x4s was particularly memorable since it was July 4 and we were stuck in CdM overnight due to the flash flooding that filled the canyon late in the afternoon and kept flowing for hours into the night and leaving us stranded by Standing Cow. Our guide was on her first trip thinking she'd be home in the early afternoon and was totally surprised so say the least. She handled the situation great, we all were grateful for her making the best of the situation and the Park Service was relieved to find out we were all OK... We finally extracted ourselves about noon the next day between shoveling ramps down the new cut banks and winching through the quick sand.
Though most of the guides seem to be self-sufficient, bring plenty of extra food and water and if it's a long day's journey add a nice tip and offer to take 'em out for a meal at least, though they may simply want to get home to be with their families.
In those many trips there, it's always been both spiritual and visually/photographically rich experience worth doing more than once!