I have 2 dumerils and love them above my other snakes. Both very docile.
The female is about 5ft long and the young male is about 3ft now.
Neither hiss or strike at me ever. They may puff a little and stiffen or startle when I first open their cage, but once my hand is on them (no need for a hook with them) they just melt like butter.
Your snakes are beautiful. Maybe it's just me, but they do seem to be on the fat side. How much and how often do you feed them?