Front Loading vs Back Loading Carbs for Physique Competitors

I have been debating with my coach about front loading vs back loading carbs for my upcoming show in Birmingham. He prefers a back load where we ramp up the jasmine rice and sweet potatoes starting on Thursday for a Saturday show. I am a bit worried that I might spill over and hold water if we push it too fast at the end.

I have seen several guys at my gym in the UK have great success with a front load earlier in the week. They say it gives them more time to adjust and dry out if they overdo it. It seems safer to me but I do not want to go against the plan of my coach if the science supports back loading more.

What has been your experience with these different methods? Do you find that back loading makes you look fuller on stage or is the risk of holding film under the skin too high? I would love to hear from anyone who has tried both approaches in their competitive career.