No, I don't recall other accounts from the non-southern side describing how guerrillas dressed. Most accounts by non-sympathizers couldn't get past the guerrillas' behavior and all those firearms. When they spoke or wrote of what bushwhackers were wearing it was generally describing the clothes on dead guerrillas. The only such accounts that come to mind were because the witness commented on how fancy the dead man dressed. And--oh--all those pistols! The west-central MO guerrillas carried so many revolvers solely to have fire superiority in a quick fight that they pitched the empties away while either grabbing a loaded one or leaving the area very quickly. Union patrols thought they were accomplishing something when they had possession of the ground after a fire fight to collect several pistols. Some even implied that to recover a Rebel's pistol meant that they had at least winged that guy and he dropped his shootin iron on his retreat! At least with the west-central MO guerrillas, dropping pistols was no big deal because they hauled so many with them. If they found themselves afoot, they dumped some of those 2.5-pound "hog legs" so they could run faster--being careful to hang onto one or two loaded revolvers. Starting in 1863 and especially in 1864 and 1865 many of the MO guerrillas customarily wore Federal uniforms for several reasons. This practice was widespread across the state, but was begun by the west-central guerrillas, who pioneered many of the successful tactics.
I hope this helps you.