Access dent in rear bumper ?

I know how to get the dents out of bumpers with heat guns but my question is... What is the easiest way to get behind the dent. It's on the very back corner. All the videos I have seen online show accessing the front. Toyota does a nice job of covering all access with plastics. Can I easily pull away some of it from the tire well ? It's snowing here today so I couldn't get a good look at it. No need to take it off I believe.

Thanks