I can’t comment on actually hunting in a saddle, but …

Me and a buddy were sort of team hunting an area a couple years ago during bow season . He was in a saddle maybe 150 yards away from me. No matter what direction I was looking, one thing caught my peripheral vision all afternoon: him pivoting around the tree messing with his position all afternoon. I can see that set up just being more prone to fooling around and not being still. If I saw him all afternoon I know the deer did.