If Randy was smart, he should have had Bob give him the "immunity idol" at tribal council. The other group may have known about the ruse, but it could have thrown a few of them off and caused them to switch their vote and sparing Randy. I don't know if Bob really wants Randy around either for that matter.
This is another great season of Survivor! I, too, was expecting some of the food to be some sort of bugs at the reward challenge as the contestants were, and of course there was nothing! If there ever was a season to play on, this would be the one I'd like! They have not had to swim at all in the challenges and they have not had to eat and sort of bad grub.