You are not guests, but co-workers. If you can have the attitude of a servant, you will be well accepted. You also will need a passport or birth certificate and driver s license for identification. Your bags must go through customs going and coming. There are also numerous roadblocks along the way.
Bags are searched, so don t take valuables or illegal substances.
Alcohol is illegal for everyone in the state in which we will be traveling. I hear Mexican jails are nasty. This includes everything except meals coming and going. We will also try to stop in Ciudad Juarez on the way home to give you the experience of shopping in a market.