What's the etiquette? Are we obligated to pay for our guests or subsidize any portion of their trip?
If you are able to pay any portion of your guests' way, it is a nice gesture and they will certainly appreciate it. Couples usually go this route when there aren't many affordable lodging options near their site. In general, though, it is not required that you cover any of your guests' expenses. But aim for harmony regardless and choose a location that offers accomodation options in all price points. You know your guests best, so keep in mind what you think they'll be willing and able to spend when you select your location.
-- JoAnn Gregoli