This was 1947.
There were no modern body bags.
They needed coffins to transport them.
You can be sure they are well preserved. Reportedly they were farmed out to various locations for study. Reportedly many are still in diverse locations.
One location was in Florida where Nixon took Jackie Gleason to see at least one body. Gleason’s wife verified it after Gleason’s death.
I was a kid then, and I remember my fascination when I read the newspaper story, and it was BIG news. I don't remember anyone having a television set at that time, so the word was spread only by newspapers.
No one believed the government story then that it was just a weather balloon, and most of us still don't believe it.