not sure exactly where your dent is from your descrip, but i just had one fixed that was directly over the passenger rear fender guard. since PDR guy was mobile, i jacked up car and took rear wheel off. when he arrived, he only needed to take off one of the screws holding wheel-well-liner in and this was enough to simply peel back the liner a bit and wedge tools thru. i cant tell where the orig dent was.

(note: he DID mention that he could feel some "glue" or "insulation" in the way/stuck to the metal where dent was. he wasnt exactly sure what it was, but in any case, it didnt seem to deter him from doing a great job.)