Can't really help you but here is a link to a really good forum for open ( canadian ) canoes. There is a thread about the Vistula and some really good discussions.
Related: Poland kayaking in April?
Quick question, is it possible to go kayaking next weekend (being that it is April and quite cold) ?
Where would be the best place ?
I have no experience, I just want to have a day or two on the water :)
Somehow we're in for a very warm and long weekend. About 26C in Warsaw and nearby for next 4 days. Kayaking would be perfect in such weather. Try this: masuria-canoeing.com