I would suggest the majority in the Trans-Mississippi just went home. Fully armed and mounted if cavalrymen. Put yourself in their place. You had been killing yankees for four years and saw many of your friends killed. Federal troops were far away and most of the state would not see the military for months. Dallas saw its first yankee soldiers in December 65. Recollect what General Sheridan wrote when his troops first began to enter the state, "Those Texans do not know that we won the war.They must be taught a lesson."
Former soldiers wishing to vote in the first 1867 election were required to take the Iron Clad Oath. Many did in order to remove the federal military governor and replace him with former CSA General JW Throckmorton. Throckmorten was removed a year later as an impediment to reconstruction and replaced again by the federal military.
With the likes of Bob Lee,John Wesley Hardin,Cullen Baker and the whole unreconstructed crew riding around fanning the flames of rebellion the violence continued for 5 more years. Texas did not go back easy into the union.