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central_va: "Chambersburg? Chambersburg was such an oddity that is was well publicized for being out of the norm behavior for Confederate forces who were known for good behavior."

Yes, certainly by contrast with other soldiers from other wars at other times.
Nevertheless, you well know that every Confederate force operating in Union states or territories, first of all, "lived off the land", meaning they took what they needed from the local populations, sometimes pretending to pay for "requisitions" with Confederate money, sometimes not.

But anything deemed militarily significant was declared "contraband" seized and transported back to the Confederate main force.

Finally, such missions were usually charged to destroy Union infrastructure such as railroads and bridges.

Examples include Morgan in Indiana & Ohio, Forrest & Morgan in Kentucky, Newburg and Hines in Indiana, Quantrill in Kansas, as well as Stuart, Jenkins and Early in Maryland and Pennsylvania.
In New Mexico it was a slightly different story since Baylor having driven off the few remaining Union forces, declared himself governor and so "taxed" New Mexicans to support his army.

Typical was Morgan's second raid into Kentucky, 1862:

"At the completion of his escape through the Commonwealth, Morgan claimed to have captured and paroled 1,200 enemy soldiers, recruited 300 men and acquired several hundred horses for his cavalry, used or destroyed supplies in seventeen towns, and incurred fewer than 100 casualties.[50]"

Other raids cost more:

"The following year, Chambersburg was invaded for a third time, as cavalry, dispatched from the Shenandoah Valley by Jubal Early, arrived.[5]
On July 30, 1864, a large portion of the town was burned down by Brig. Gen. John McCausland for failing to provide a ransom of $500,000 in US currency, or $100,000 in gold.[42] [43][44]

"...'Remember Chambersburg' soon became a Union battle cry.[46]"

Even more so was Quantrill at Lawrence, Kansas:

"...on August 21, 1863, William Quantrill led Quantrill's Raid into Lawrence destroying much of the city and murdering over 150 unarmed men and boys. "