We are excited about our booking next year on the Douro river cruise. Wife likes to exercise on the top deck of riverboats while we cruise, except of course when the captain has to close the deck due to low bridges. Deckplan for the Douro riverboat (the Andhorina) shows that much of the top deck is taken up by Arthurs and the swimming pool. Wondering if there is any area set aside for a walking track or place to exercise walk on the top deck like there is on other Tauck river boats?