I'm preparing for my Camino de Santiago pilgrimage. What are the key packing tips, specifically regarding how to prevent bed bugs and the recommended weight limit for my backpack? Provide the advice found on the website.
Navigate to the 'Preparation' section from the homepage. Click on the 'Packing List' link. Identify and extract advice on preventing bed bugs. Identify and extract the recommended backpack weight limit.
State the advice for preventing bed bugs (e.g., permethrin spray, silk sleeping bag liners). Mention the general packing principle of keeping backpack weight under ten percent of body weight.