Peter,
(addressing this from a formula car perspective)
One thing that gets me is that for the most part we are clearing cars with the same equipment and personnel that do that job on the street. I know we cannot afford cranes and the like, but maybe spending time thinking about this would be more productive than a new rain light (small dig.

)
Maybe it is about time we design a low flat bed trailer that has the capability of loading a race car quickly and is able to capture any fluid leaking. For example with dual winches to pull a damaged car on evenly. Special dollies to support a damaged corner.
Flat towing cars is a disaster waiting to happen (re FV at Indy) and a smaller truck and trailer can probably make it around much faster, especially if it is just a mechanical and not an accident.
I am also assuming (although will check when I am at Thompson in a week), that the current wreckers can be staged around the track and especially in areas known for incidents. I hope that someone meets with the new guys and they are trained on lifting and securing formula cars.
I am hoping like other pro racing, that areas are designated for race cars to be deposited after accidents and not have to go all the way around back to the paddock during a race. They can be moved after the race.
In the "old days" tire walls were just lose, woven tires, now it seems that they are banded or bolted together. (Probably designed for the heaviest car hitting them. Gerard Owen Callahan (FV) barely scratched the tire wall when he hit it head on.) This is a track question, but are they designed in sections for quick repair and do they have a tire truck standing by with loose tires (I know - Insurance, Insurance) or a new section for a quick repair? Would it be better to have a boom truck for this rather that tractors and fork trucks?
Maybe set aside time at the next convention for this topic - it would be great for the SCCA to lead this for other groups to follow. I am sure some tracks do these things better than others and we need that input.
ChrisZ
PS - All drivers should read GCR 5.4