We did the Southern route from Union Island last year in the daylight with just our charts and visual. A little nervousness but nothing more than any other tight spot. Not sure if our charter company had it redlined or not as my partner attended the briefing. With a good chart review ahead of time I would feel pretty comfortable as I had no prior experience. We usually double up our chart programs and GPS to make sure they agree when in these tighter areas where 10 feet could mean a big difference.