All able-bodied free white males aged roughly 16-60 years (varies by time and place) were obligated to be available for Militia duty for defense within the County.Many rosters survive that were made at the time of a regular drill and nose-counting, but do not reflect active-duty service.
You do not say which of Craven's books you found a Hogshead listed in, so I can't comment on it.
In an alphabetical listing of some VA militia, John H. Gwathmey, in /Historical Register of Virginians in the Revolution/ (Richmond, VA: 1938; and Baltimore, MD: Genealogical Pubg Co 1973, 1979) lists a Hogshead, Michael, Capt. Trimble's Co., Augusta Co. (as well as other Hogsheads in the same Company).
Gwathmey gives no source-reference for this.He states that "Where no special reference is given the name is to be fund in the alphabetically indexed papers in the Old Reords Div, Adjutant General's Office, War Dept, Wash. DC."
I can only guess that this means the massive "Miscellaneous Numbered Records (The Manuscript File) in the War Department Collection of Revolutionary War Records, 1775-1790s, 1775-1790; (National Archives Microfilm Publication M859, 125 rolls); War Department Collection of Revolutionary War Records, Record Group 93; National Archives, Washington, D.C."This manuscript group is described this way:
"This database contains images of about 35,500 miscellaneous numbered Revolutionary War records, also known as the “Manuscript File.” These records cover topics such as military operations, military service of individuals, pay and settlement of accounts, and military supplies.
"Some of the records included in this collection are originals and some are copies. Most of the original records date from 1775-1790. Some of them date from later years; these generally regarded the settling of accounts and granting of pensions. Copied records were created by the War Department in the 1890s."
There are indexes to this record group, in themselves also very large in volume.Both the Manuscript Group and the Indexes have been microfilmed and can be viewed at the National Archives.Ancestry.com has the images of the Manuscript group on its site, but not the indexes, and there are no navigation aids whatever.The LDS' Family History Library has both the Manuscript Group and the Indexes on microfilm.The indexes are on many microfilm rolls; the Manuscript Group is on some 125 microfilm rolls.You could work with your nearest LDS Stake Family History Center to borrow index microfilms for a few dollars per microfilm roll.Most Family History Centers would not have the detailed description of what is on each index roll.
Back to Gwathmey's reference to a Capt. Trimble.In Heitman, Francis B.. /Historical Register of Officers of the Continental Army During the War of the Revolution/ (Washington, D.C.: The Rare Book Shop Pub. Co., 1914) is listed a Capt. James Trimble, "Virginia Militia in 1778. (Died 1804.)"
Heitman does not state what County's Militia this listing refers to, but there were at least two men by this name in Augusta Co., with entries in Chalkley, Lyman. /Chronicles of the Scotch-Irish Settlement in Virginia, 1745-1800. Extracted from the Original Court Records of Augusta County/ (Baltimore: Genealogical Publishing Co., 1965. Originally published in 1912).
You can find Chalkley's three volumes posted in transcript on the internet, well-indexed and with links for each entry.There are also Hogsheads in this book, and you might find something useful there.