That Beatty bio is sh!t. The bisexual claims are false, in or out of prison. The police created this myth in order to discredit him. Yes, he was assaulted while at Eastham prison by a larger man, but Clyde got his revenge when he teamed up with a lifer and killed the assaulter.
Several untruths were told about them during their two-year career. One story related by J. Edgar Hoover has Bonnie driving the car, while Clyde slept in the passenger seat. She stops a traffic cop to ask for direction, he gives them to her, tips his hat, then she pulls out a sawed-off shotgun and blows his head off. She and Clyde laugh and speed off. Needless to say, this never happened, but such stories helped to turn public opinion against them. Incidentally, this same scenario was used in the movie NATURAL BORN KILLERS, when Mickey & Mallory stop a rookie cop for directions and then Mallory shoots him in cold blood.
Whizzer, off the top of my head, besides Buck and Blanche, other members were Ralph Fults (an early member who was captured with Bonnie in an early robbery), Raymond Hamilton (Clyde's one-time best friend and on-and-off member; he was rescued from Eastham by them), W.D. Jones (the youngest member at 18 and childhood friend of the Barrows who also idolized Clyde), and Henry Methvin (unknown to the gang when B & C raided Eastham; he escaped with them amid the chaos and became a full-time member).
As for their fates, Fults gave up a career in crime and lived to an old age. He later related his involvement in the Barrow gang to several biographers. Hamilton and Clyde may have been best friends, but they were both hot-temepered and fought like cats and dogs. This caused Hamilton to depart several times. The final time he was apprehended and was executed in the electric chair. Jones was with them for two years, but he left the couple after Buck's death and Blanche's capture. When he was arrested shortly thereafter, he turned against B & C. He lived to see the Beatty/Dunaway film (in which the character of "C.W. Moss" was a composite of him and Methvin), but was killed by a jealous husband when Jones had an affair with his estranged wife. Methvin ran with the couple for 4 months until his father betrayed them to the cops. Though he received leniency, he was later killed by a train when he was tied to the tracks. Many believe it was a vengeful death for the betrayal of B & C.
Re Bonnie's potery, her most famous are "The Story of Suicide Sal" (written in jail after she thought Clyde had jilted her when she and fults were arrested; the story is about a woman who gives up everything for her con-man, who later leaves her to get captured) and "End of the Road" (AKA "The Story of Bonnie and Clyde," written just a month before their deaths and contains the prophetic last stanza:
Someday they'll go down together
And they'll bury them side by side.
To few it'll be grief,
To the law a relief,
But it's death for Bonnie and Clyde.
Salve, Regina, Mater misericordiae
Vita, dulcedo, et spes nostra
Salve, Salve Regina
Ad te clamamus exsules filii Eva
Ad te suspiramus, gementes et flentes
O clemens O pia