Summers are made for this
Had been looking at getting a camp moc as opposed to a boat shoe- came across Rancourt. Since they are somewhat close by I stopped in at their showroom in Lewiston ME. Glad I did- it was helpful to get the insider tip on sizing for their camp moc. Man suggested going 1/2 size down and slightly wider- I am normally 9D and in camp moc I took an 8 1/2 E. The fit is fantastic and you can tell its a quality build.
Other than sizing, a note on the color. The website photos looked much darker, but the actual medium brown buckaroo is much lighter than the online image.