The problem with stretching inner fenders back (as I discovered on a '95 4Runner with a similar hit) is that it's hard to grab the metal and not have it tear when you apply force. There are special purpose clamps made for this, or you can use the old fender, blocks of wood, and other hillbilly methods. When I finished with the 4Runner, the body fit on the outside was flawless and the inner fender, while wrinkled and straightened, was hidden by the battery and did not scream 'redneck fix'. I even found junkyard body-color parts, so the dings and chips matched all over the truck perfectly.
Be VERY careful about cutting through things with a Sawzall - I cut through the top radiator shell cross member on a '99 Camry and then discovered, um.... wiring that Toyota ran inside the area I cut. Fortunately, it wasn't shielded wiring, so I could repair it, but I felt like a dolt.