To put my responses above in context with some photos, these are taken from the display on the Friday, the accident happened on the Saturday.
Friday performance, lead aircraft of the pair of Yak-3s, takes the concrete runway at the end of the performance, and will roll out to end of the runway and stay to the concrete and left of the contrete runway until the second of the pair has landed and completed his roll out. When both have completed roll out they will back track down the concrete runway and the area to the left of the concrete runway along the crowd line to their parking area that is back to the direction they landed and behind the crowd line. That then opens up the two grass runways parallel to the concrete runway for any aircraft taking off on the grass runways
Lead of the pair continues his roll out staying to the concrete runway. Note off the nose of the lead in the background at the left edge of the photo, parked beyond the edge of the further parallel grass runway, the equipment hit during the accident on the Saturday, parked well off the edge of the grass runway areas.
The second Yak-3 of the pair, as briefed, takes the parallel grass runway to the right of the concrete runway and remains on the grass for his landing and rollout.
2nd Yak-3 of the pair from the Friday, here during his landing roll out, tail is down and nose is obscuring forward view. He continues his rollout down the closer grass runway parallel to the concrete runway used by No.1 of the Pair. Note in the background the equipment involved in the accident on the Saturday, well clear of the further of the two parallel grass runways and parked where briefed.
In this photo, pairs landing roll out, the Yak-3 closest on the concrete runway, the P-40 in the background on the further of the two parallel grass runways.