Funny you should ask. I moved back to P'Cola from Houston a couple of years ago, then bought a house and 5 acres a few miles outside Pollard and Brewton. I recently reached the point in my research of wanting to see some of these sites and began to try and put them on a map. Other than a few historic markers there isn't much else to see. There is a little community of Pine Barren on Pine Barren Creek and there is a creek still called Cotton so it at least is relatively easy to narrow down. If you get off of 29 it can be a challenge to do much exploring because there are not an abundance of roads. This part of Florida did not do a good job of preserving its history. I am working with some friends to try and reverse that in some areas in both Florida and Alabama. It is likely they marched north close to the railroad track which wonders a bit east and west of current 29. Let me know if you find anything. It is fair to assume that 29 is pretty close to the original road from Pensacola to Evergreen.
I've also been working on Spurling's route around Andalusia to Evergreen, Sparta and Pollard and identifying the men from the 1st FL Cav who were with him. He took the long way around for sure. But in the course of talking with a cousin who owns a family homestead with an 1860s era house still on it between Andalusia and Evergreen, I discovered that the property has an artisan well and they use to find both Confederate & Union buttons in the plowed field. It also appears that in his journey from Evergreen and Sparta he marched east to Brooklyn (not NY but an interesting visit) before heading to Pollard. That puts him marching very near my property. Strange how things turn out sometimes.
Pollard is an interesting visit. It never recovered its importance during the war but is a picturesque community. Good luck on your trip.