I see that our good frind Jim McGhee has answered art of your question for me on the Missouri board.

Now, as to:
3/25 HQ Arty Bgde Camp Churchill Clark G O #7
Per GO #3 of Gen Price, the arty co known as [Wm] Hart’s Btry is hereby disbanded-those that wish to reenlist in other btrys can do so to redeem the reputation they have lost of a few bad men of this Btry

I have searched high and low through piles and pies of files and computer records, but can't positively ID the source I used to make this entry in my personal use only files.

I strongly suspect it came from here, but I no longer have the hard copies to verfy:

Henry W. Williams (1816-1892) Collection, 1835-1953 (bulk 1848-1890)
2 boxes, 8 volumes
Missouri Historical Society Archives
Civil War Series
Box 2
Folder 4
1861 Dec 18-1862 Apr 9 Order book of General Orders of Governor Jackson and Daniel M. Frost, primarily in Arkansas, regarding affairs of the Confederate army including: the officers to serve under Frost; the daily schedule in permanent camps; the court martial of Thomas Delaney and William Bamberg with an extensive list of their crimes and punishments; inspections by quartermasters; extensive instructions to prepare for a march from Cove Creek, Arkansas, to Fayetteville, Arkansas; rules for the newly established Camp McCullough. 30 pages