I just went to the site listed above and it says "NO" bags of any kind, including handbags, purses, and camera bags. I was last there 7yrs ago and that was the rule then. You can carry a camera hung around your neck. Since I opted not to carry my camera, I did not notice whether DSLRs were allowed. Note, though, this web site is not the official Gov't memorial web site, but a tour web site. The Memorial does not charge to visit - it's a sacred site, as in cemetery. There is paid parking, however. The Missouri is not a sacred site and will allow (again, my info might be dated) cameras, etc.

Enjoy your visit. O'ahu has 3 interstate highways. The challenge is to drive to another state on one of them :-P