A few practical tips:

• Decide together how long you are going to walk and divide this time in 3 equal parts, because there are 3 rounds of questions.
• Agree who starts with asking a question from the step-by-step guide and alternate turns. 
• Discuss where you are going to walk, then you don't have to pay so much attention to the road and you can focus more on the conversation.
• For high needs, check public restrooms.