It didn't state how far "Back" in time.It would determine what type of weapons to bring.
If he's going to the Jurrasic period I'd think a 460 Weatherby would be a good idea.
Sometimes ....IMHO its better to just let things lie.....I can understand the reason for Snopes and the like ....... I think a bit of whimsical without the buzzkill can't hurt though.