I have updated the Web page for photo places in Mt Rainier NP with a second map from a set of pamphlets with two maps by photographer Tom Haseltine, dividing the NP into southern and northern halves.
The places on the maps in the pamphlets different somewhat from the places in the chapter on the NP by Greg Vaughn in his book Photographing Washington but more often overlap with respect to the common areas and places photographers go in the NP.
The problem is that there is just too much to photograph in the NP and too many places to go so photographers have to ration their time for the few places they have time in the NP. Very few photographers have the access to return frequently enough to photograph in more places.
And fewer photographers wander more than a 1/4 to 1/2 mile from the road, into the backcountry, often for days at a time. Even I limited myself to long day hikes for personal reasons but still managed to get 5-6 miles into the backcountry, short considering the size of the NP.
Anyway, the Web pages are there for visitors and photographers. I highly recommend the book, especially if you're visiting Washington State and the NP is one of the places you want to visit and photograph.
And I recommend the pamphlets because they're full of places with a good map to know where you can go. But remember the NP has seasons and not everywhere is open outside of summer, so you need to take the time of your visit into account.