Hawaii was hiking & driving, Denali was biking & one day on a bus.
Maybe half of the nights in Hawaii were spent outside versus almost all the nights on the Denali trip were camping.
Walking (Hawaii trip) is slower, allowing for more photos, but biking is more continually immersing than driving to places, so more photos can be taken continuously throughout the day instead of just specifically at each destination. There was a lot of time on the Hawaii trip just sitting in a car going to the next place.
Denali trip had more daylight hours to take photos (thank you Alaska summer), whereas in Hawaii, the sun is pretty much on a 12/12 cycle.
Camera type didn't seem to matter in the number of photos taken, which I'm happy about. It seems as if I still took all the photos I 'saw' or desired to capture. My enjoyment taking them was higher in Hawaii, however, in using a real SLR instead of a point-and-shoot camera with SLR capability. So... maybe camera type did produce more or less images?
I had the cameras readily accessible on both trips, mounted in a camera case just in front of my handlebars for the Denali trip and in a camera case slung over my shoulder and neck in Hawaii. The camera was accessible while riding the bike, but it obviously takes more skill to ride one-handed on a rough road and work a C-shaped zipper with an out-stretched arm than it is to stand in place and unclick a buckle on a case that is hanging off your body. This probably led to less photos on the Denali trip. 20 photos per day? Yeah, probably. I do remember quite a few times wanting to stop and get a shot, but didn't, for various reasons.
One thing based off of these last two points of camera type & accessibility is a closer look at the combination of those two factors instead of separately. While biking, it would be challenging to use an SLR with one hand, but a point-and-shoot style is much simpler. While hiking, I'd specifically choose the more complex camera for higher photographic ability, as...
Hiking vs biking: you can stop and get a shot anytime when hiking but when biking, there's all the downhills doing up to 45 mph... not stopping to get a shot then.
I keep my cameras on single shot mode almost all the time and did so on both of these trips.
Rain really wasn't an issue on either trip, having only to put the camera away once or twice on both trips, only for an hour or so.
What do I take away from all this? Well, having thought about this before, not much. Obviously, if it's raining or dark, if you're indoors or driving, or just super-consumed by whatever you're doing, you'll probably capture less photos. Beyond these obvious limitations, I'm most likely still going to see and capture about as many photo opportunities no matter what I'm doing on outdoor trips. Every place is different and every experience will therefore be, too.
What do you take away from all this?
Am I missing anything here? Any other thoughts? I'd love to hear 'em.