Timo Noko wrote:

The burning issue in everybodys mind seems to be "Can you ****
without removing or soiling the suit?." -- Yes you can, but you need
some kind chute to direct the waste, in case it comes in liquid form,
(after eating raw oysters). Narrow eskimo-style paddle would
suffice.

This something you'll never be able to do in a dry-suit. Most
important issue, imagine -30C 60kph wind blowing from Davis Strait.
You just cannot remove any of your clothing, not for a second.

Dry suits and underlayers are available with half-moon zippers that solve
that problem. No "chute" necessary.

--
Regards

Brian