Language
Generally if you need to ask about route, direction and so on, ask young people who usually speak English and sometimes German, Russian, Spanish etc.
Very useful and helpful could be to know a few important Polish words:
Hi - Cześć
Good morning - Dzień dobry
Good Bye - Do widzenia
Sorry/Excuse me - Przepraszam
Please - Proszę
Thank you - Dziękuję
Bicycle - Rower
Road - Droga
Straight - Prosto
Left - Lewo
Right - Prawo
Water - Woda
Food - Jedzenie
Shop - Sklep
Tent - Namiot
to sleep - Spać
to eat - Jeść
free rooms - Wolne pokoje