We would like to do a few days of hiking/walking in late October/early November. Any suggestions as to`organizations that could help us with a guide?
Erring on the side of caution, that may be a somewhat cool/ wet/ chilly time to go - it really depends where you're hiking (and if you hike in all seasons). I would get a Poland travel book from the library and look there. Certainly any city travel bureau would also be able to help. In the popular areas, the trails should be easily marked and Ok to do without a guide.
The below are not the best links but maybe they will lead you to others: