Post in the area you're going to be in. Louisiana is split in two, New Orleans for the southern half of the state and Shreveport for the northern half. Under the umbrella of the New Orleans (NOLA) forum, there are 5 cities that are included within it - NOLA, Baton Rouge (80 miles west), Houma (60 miles southwest), Lafayette (150 miles west) and Lake Charles (220 miles west, just before Texas).
Texas is broken down into about 8 cities.
If you are just visiting NOLA then place your ad in the NOLA section. If you're visiting more than one area, which I doubt) then post ads in those cities as well as long as you don't exceed 5 total ads posted at one time.
Read the advertising guidelines.
http://www.eccie.net/showthread.php?t=19347
Some of our Metro Locations have Provider Ad Subdivisions. (ex. Dallas/Fort Worth, 5 NE Texas Subdivisions, etc) You may post your weekly ad in as many subdivisions you would like within your 5 city allotment for the week…..however, you must be advertising availability for the geographic location you are advertising in….whether you will be traveling there from another city, have an incall in that town, or provide outcall appts to that area.