Don...

It is unlikely that an Alabama Regiment was in winter camp near Bristersburg in Fauquier County around First or Second Manassas. After First Manassas all of the regiments went into winter cabins around Centreville, Manassas, and out towards Bristoe Station west of Manassas. The regiments that were assigned to Blockade duty along the Potomac River between May 1861 and March 1862 had cabins close to Dumfries, Virginia. The only Alabama regiments in Dumfries (or along the Potomac) were the 4th Alabama and the 5th Alabama Battalion (see "The Confederate Blockade of Washington, D.C., 1861-1862," by Mary Alice Wills). The 14th Alabama was also at Evansport on the Potomac.

The Army of Northern Virginia never went into winter quarters in Prince William or Fauquier Counties after their return from the Sharpsburg Campaign (after Second Manassas). Lee moved his army from Winchester to Culpeper Court House and then to Fredericksburg for the winter.

It may be possible that the camp you are referring to is a picket outpost that was manned after First Manassas. Confederate pickets were going out 10-20 miles in all directions from Centreville during that time. Companies and even entire regiments were sent out on picket duty for a week at a time. While the advanced posts were out in the open, their headquarters were usually in tents or cabins a few miles back.

John