Depending on your balancing skills and having a place to put the wader, you could take them off.
I personally would not risk it.
If you take your top off and leave the waders on, you may not be too hot.
You should always have drinking water for hydration.
Pleas let us know what works. I found my clothing that I was talking about, but did not see any ID on them. I will try to find the paper work if I can.
Best wishes.
P.S. I just saw these:
http://www.ebay.com/itm/dry-pants-wa...item25aed93835