Final answer:
If no clean, hard, dry surface is available to place your bag, you can either create dryness using hand friction or sunlight, or consider managing without the bag entirely.
Step-by-step explanation:
If there is no clean, hard, dry surface area to place your bag, the two options you have are to either find an alternative way to protect your belongings or adjust your plans accordingly. One approach may be to rub your hands together to create heat through friction in a bid to dry a small area for your bag. Another method could involve harnessing sunlight, potentially by concentrating it to dry a wet surface or using the sun's warmth to dry items that have gotten moist. If neither option is viable, you may need to consider whether you can manage without a bag at all to avoid the risk of your contents being damaged or dropped.