Jim, the 1st Arkansas Mounted Rifles was the regiment who was at Camp Yancy. The 1st Arkansas Mounted Volunteers (which became the 3rd Arkansas Cavalry) was at the other side of the State in July 1861, camped around Pocahontas. Is an earlier thread we posted quite a bit of information about the movements of the 1st Mounted Vols/3rd Cavalry.
Here is a summary written by Colonel Hobson in January 1863 --
General Explanatory Remarks. This Regiment was originally mustered into the Confederate service and organized on the 24th day of July, 1861, for one year. Some of the companies were previously mustered into the State service, but the whole transferred and organized as a regiment on the day above with eight companies with Solon Borland, Colonel, James M. Gee, Lt. Col., D. F. Shall, Maj., and N. D. Holmes, Adjt. Lt. Col. Gee resigned in Sept. 1861, and B. F. Danley succeeded. The regiment was then called 1st Regiment Ark. Mtd. Volunteers. This organization remained the same until the reorganization on the 26th May 1862, except it took the name of 3rd Ark. Cavalry by orders from War Department about 15th January 1862. The present Roster is exhibited from May 26, 1862, the company officers then taking rank from seniority and reelection. After the reorganization 3 other companies from Williamsonís Battalion Infantry were ordered to the Regt. Coís I and K of the present organization remained attached when remounted in Dec. 1862. The other Co. E of Williamsonís Batt. was at that time transferred to Stirmanís 1st Ark. Battalion. The present Co. E was detached by Geníl Hardee in Sept. 1861, was subsequently attached to (so-called) 2nd Ark. Cavalry, Col. Slemons, consolidated with Capt. J. Earleís Co., and finally returned to this Regt. in Jany 1863. This Roster exhibits all changes from the date of reorganization 26th May 1862. Many of the orders for changes and the election returns are lost from the record of the Regt. but should have reached the War Department long since through the regular channels. The Regt. entered Confed. service for 12 months on 29th July 1861. A. W. HOBSON, Col. Com. Regt.
And here is a summary from Company A (I couldn't find one for the Camden Cavalry, Co. G) --
Co. A was mustered into the service of the State of Arkansas at Little Rock on the 10th day of June, A.D. 1861, for a term of twelve (12) months. Was transferred to the Confederate service at Pocahontas on the 29th day of July, A.D. 1861. The Co. was actively engaged on outpost duty & as scouts in the North Eastern portion of Ark. & South Eastern portion of Missouri until the 6th of April 1862, at which time it was ordered to Corinth, Miss. The Co. was dismounted at Des Arc, Ark. under the promise that the men should be in a short time remounted & that while they were dismounted they should receive the pay & emoluments of regular cavalrymen. The Co. arrived at Corinth about the 1st of May Ď62 & while there were often on picket duty & also in the skirmish at Farmington. The Co. was reorganized on the 10th of May 1862.
When Hardee pulled the Arkansas troops out of northeast Arkansas in the Fall of 1861, only Borland and his mounted volunteers were left to guard the "Gateway to Arkansas" (Pocahontas and Pitman's Ferry). The regiment spent most of its time broken down into scouting parties until April 1862, when Van Dorn ordered them to accompany him to Mississippi with the rest of his army.