I can't remember if I've seen the film but I have read about the Hills case. The bit I remember was deciding I didn't believe it for the reason I've already stated, paper star charts, I don't think so.
Be careful when reading books about this stuff. Remember books are all about making money. So are movies.
When it comes to Roswell there are so many books on the subject, each with wilder, more sensational claims than the books that came before it that it's taken on a life of it's own.
First there was wreckage and a huge gouge in the ground. Then there was a disk. Then there was an additional crash site. Then there was an additional disk. Then there were dead aliens. Then some dead and one surviving alien. And so the story expands, and will no doubt continue to expand.
A whole Roswell industry sprung up.
Read what Mac Brazel said about it, he was the one that actually found the wreckage. He said he saw this stuff scattered around his field. No mention of any huge gouge. The wreckage was so un awe-inspiring that he didn't even bother to examine it for three days. When he did look at it he described the wreckage as being "mostly balsa wood sticks, tin foil and rubber strips". He also said "there was a small fin glued to a surface and some scotch tape". He picked up most of it and put it on the table in his shack, he estimated the total weight of what he had collected as being about 10 pounds (5kg). This was what he said before being interviewed by the military so it's not a case of him being 'got at'. Not even the conspiracy theorists dispute he left it in the field for days before examining it.
Also remember that in 1947 everyone was looking for flying saucers, there was a reward issued for the capture of one. You could have dropped an ice cream van in that field and it would have been an alien spacecraft.
Those aliens must have been really mega advanced if they could fly around the galaxy in a vehicle constructed from the sort of materials you can pick up from any hardware store for $10.00