The field trip should take anywhere from a couple of hours to all day.
Any mode of transportation is acceptable, if appropriate to the trip.
You should select at least one aspect of the area to emphasize in your report. Examples of possible trips are given below, but you are encouraged to come up with your own ideas. If you are planning to travel somewhere within the state for Thanksgiving, you would probably be able to incorporate your field trip along the way. You might want to take your field trip to the area on which you are doing your research report, but that is not a requirement and might not be desirable in some cases. In either case you should write a separate field trip report.