#6. "RE: How to do in-camera HDR using a remote." In response to In response to 5
You can set the camera to shoot in timer mode where it takes 3 shots in succession. That combined with bracketing will allow you to get 3 shots to make an HDR in post with whatever software solution you like. I use this strategy frequently so I only have to touch the camera once or can also use the timer/remote mode.