take some old clothes, and a few extra pair of shoes.
live by the host's house rules.
plan to see some of the countryside.
be willing to experience a new way of life.
be upset if your bedroom and bath are on different floors. After all, they're both inside!
keep the farm folks up too late.
go to a farm with the expectation of learning a lot from the host family.
bring a supply of games and books, along with appropriate clothes in case of rain.
take a pet unless you ask first. City and farm animals don't always get along!
make your vacation arrangements directly with the farm of your choice.
wipe your feet before coming in the house, and instruct your children to do the same
forget your camera. There will be plenty of "firsts" to record for posterity.
have a great time!