Ouch. Any pictures for reference? Are you camping right now? Obviously you are not going to want to try using the LP appliances, since your regulator isn't going to be able to provide the right pressure, due to the crimped lines. So it stands to reason that you'd have enough for the pilot light, but not enough to fuel the burner. Pictures would sure help, but I'd be inclined to start where the main supply branches off, and effect the repair from that point, if multiple branches are damaged, rather than just splicing in a section. Fewer joints, fewer chances for leaks later.
Welcome to the forums, by the way!