Mjurray, I don't use a slide (never tried one). Just a flat pick in my right hand fingers while the stiff fingers of my left hand move faster than they want to. The group I usually play this with involves two acoustic guitars and a pedal steel. The pedal steel player is the only one wth a slide. Everybody takes a turn at lead while the others do back-up. I start off because I'm the weakest player. Despite my fumbling, what a great sound we make.
You do bring up a good point. A single guitar player using a slide would come closer to emulating the sweet sound of the pedal steel. I'll have to try that.