Geographical info. FYI
They live in a very rural area. There would not be cameras. In town there typically would be at gas stations but only inside and directly on the pumps. There would definitely be inside the Walmart.
Their address is CAMDEN, MS.
"Camden is an unincorporated community located on Mississippi Highway 17 in Madison County, Mississippi. Camden is approximately 12 miles (19 km) northeast of Sharon and is located within the Jackson Metropolitan Statistical Area. Although unincorporated, Camden has a post office and a zip code of 39045."
Nearest town with a Walmart would be Canton. Canton is known for one thing really, a huge annual one day flea market.
http://www.city-data.com/city/Canton-Mississippi.html
Located in Madison, County:
http://www.city-data.com/city/Madison-Mississippi.html
The other nearest city would be in the city of Madison, MS, which is the country seat.
http://www.city-data.com/city/Madison-Mississippi.html
Look at the statistics such as median household income and average home value from city to city and to county overall...and see if you are thoroughly confused.
Madison county is fairly unique to MS having such drastic differences within the same county. This is due to it's proximity to metro Jackson, MS.
Cameras other than within businesses would not be the norm for most of MS. In a lot of areas dirt roads are still common.