Some more suggestions...
As others have pointed out, take care of the cold and moisture problems when going back and forth between cold/warm environments. No camera sealing can protect you from that, only good discipline can. The same can be said for changing lenses/gear while out on the field. People were taking pictures in the (Ant)Arctic 40 years ago when cameras were not weather proof as today. The weather is still the same as 40 years ago. I know it can be tempting to check soon your pictures once back on warmth of the ship but that's exactly what you don't have to do in the first hour. Let your gear warm up gradually first.
Do you recommend putting the camera on a plastic bag before entering the ship and keeping it there for one hour or more? Should I use any other technique?
The basic rule is to avoid sudden and large changes in temperatures and humidity on both lenses and cameras. The thing you need to consider is that the longer it takes for your gear to warm up gradually from the outside temperature to the inside warmer temperture of the ship, the lesser the condensation problem. This depends on the difference between outside-inside temperatures (wider difference =longer time). A simply plastic bag like the ones you get from a supermarket will help but only marginally. A zip bag will help more. You can also simply leave your gear inside your closed photo backpack and put your jacket on it as a further insulation and then let the gear warm up gradually (longer=safer), possibly away from heating sources. If you have to take out memory cards, battery or change lens, do it before coming back inside.
To answer your question about leaving your gear 1 hour inside a plastic bag, considering outside temperature in the -10 - 0 range and the inside one around 20C or more, I would wait more and add more insulation (photo backpack and jacket on)
Also, before you go, I suggest you take a look at this book "Poles apart" from Galen Rowell. It's an old book but I find it a simple but at the same time inspiring book. At the end you have also short notes on the technical stuff (lens, aperture, etc.) for each picture. It can be found online.
The book appears to be amazing. I found some pages online and I will try to get a copy.