Lots of good information here that will make events more fun and safer.
Regarding gridding cars at an angle without backing in. This could be done, but would require we use the middle of the grid lane with driving lanes where the parking spots are at the periphery. No problem with that. The limiting factor is how much room is there? How many cars can we handle doing that? I have not counted the spaces available down there. It still leaves 2 driver cars backing into their grid spots.
As for angle parking, we could force all drivers to go all the way to the end of grid, turn around and come back to their grid spot. This would make backing at an angle easy. It still results in a lot of movement in grid, although not any more than we had Tuesday night.