In regards to Tina, has it been seriously considered that she could have handled the Tina Bar money?
She told the FBI she had sarcastically asked Cooper for some of the money, after which he offered her several bundles. Firstly, why would you kid around with someone who has threatened your life? Secondly, no one else reported on this exchange (Tina asking for money), so it's her word and her word alone.
As referenced previously, she was a 45 minute drive from Tina Bar in 79, and then ducked into the convent in 1980. I don't believe that Tina was involved in the hijacking, or knew Cooper prior to the hijacking, but what was stopping her from accepting a couple grand after a stressful work day? After all, she had already accepted one of Cooper's cigarettes. I could be exceedingly wrong here, but I figured I would put it out there.