"At at the end when she is asking where Jack is going to be in 6 months, is that to find him after she has their baby? seems to imply she is preggers. "
I don't think so, it was more like so much had happened climaxed by Jack killing her father albeit in self-defense right in front of her, that they both knew there had to be a break (either a bad pun or a deeper meaning to the title) before they could approach each other in normal circumstances. I, too, thought Kathleen Lloyd one of the most beautiful and winsome actors of her time.
The critics at the time panned this movie from hell to breakfast. I thought then, when I saw it at the cinema, and I think NOW, that it stands not only as quite possibly one of the best movies ever made, but quite definitely as one of the best Westerns ever made, with a Shakespearian "tragicomic," more realistic, take on real life than any of the "iconic mythology" films of Huston, Walsh, Ford, and even Peckinpah and Walter Hill. The many scenes at Nicholson's camp, especially the dialogue between Nicholson and the understated and always-sublime Harry Dean Stanton, are simply tiny little masterpieces, like those tiny-but-incredibly-detailed-and-nuanced paintings of the 16th century, like Adam Eisheimer's "The Flight into Egypt."
This is, IMHO, Jack Nicholson's finest performance ever, trying and succeeding with keeping the real script in play while Brando extemporized the whole thing, a stenographer running around behind Brando at every scene, writing down every line, so it could be put into the script post facto. Then there's Brando, in a role that I think only HE could have played, eerily presaging that of the character Colonel Walter E. Kurtz in "Apocalypse Now," and exceptionally fine supporting performances of vastly under-rated then and now actors like Lloyd, Harry Dean Stanton, Frederic Forrest, John P. Ryan, John McLiam as Lloyd's father, David Braxton, and a hilarious turn by Steve Franken as "The Lonesome Kid." And over it all stands the amazing talent and (apparently) inexhaustible patience of Arthur Penn.
This movie is simply one of the best ever. Period.