Travelling Jellies: Any tips for Mexico travel?

The company I work for is planning a trip to Mexico as a sales incentive. We’re (read: they are) going to an all-inclusive resort in Cabo. I’m in charge of writing a brochure of tips and tricks to make their travel time easier.

Is there anything I should know? I think I heard a rumour that wearing camouflage clothing is illegal in Mexico. Is this true? Anything else to help these people keep from getting locked up abroad?