Staking a fence line location requires boundary determination. A PLS can stake a line for a fence BUT as others have posted , the pin should be verified by a survey including adjoiners to make the determination.
As a property owner you can survey your land but you are totally liable for your actions. You should notify
adjoiners of your intent.
In Louisiana, I have done fence staking surveys. One must title research, field survey and stake the line.
One must retain all record of the survey and the data collected should be sufficient to prepare a boundary plat if requested. I prepare a plat of the staked line for the client/contractor and notate on the the plat the intent of the survey. One must show any occupation features along the line.
The monuments for determination are depicted on the plat also. A survey report is given to the client.
Does everyone know about NOAA's declination tool
It is here: http://www.ngdc.noaa.gov/geomag/magfield.shtml
Worst case vs Best case
Before you do anything check here. Read up a little, get yourself a Silva , do a little math, and go explore your property. Once you get to where you're going, walk up and down the fence row, no telling what you might find. Most of all have fun. Then call your local pro to come survey your property. If he wont let you be his helper at least tag along and watch the magic. By that time you will have the "bug" and will be scanning the help wanted ads for a survey job. Who knows , maybe by the time you're ready to sell, you will be able to do your own survey, and if not at least you will be one of those "rich surveyors" and the cost will not matter.
Or, just hire a pro now and go on with your life.