Hello! It sounds like you're preparing for an adventurous trip to Portugal. Lagos, Faro, Albufeira, and Cascais are all incredible places to visit. Here are some detailed travel tips for your journey.

Best Time to Visit:
The best time to visit these cities in Portugal is during the months of April to June and September to October when the weather is warm and pleasant. The summer months (July-August) tend to be crowded due to tourism peak season.

Route and Accessibility:
Lagos, Faro, Albufeira, and Cascais are all accessible by train and bus services from Lisbon, the capital of Portugal. If you're starting your trip from Faro, you would benefit from renting a car as the Algarve region offers various picturesque sites that are best explored at your own pace.

Accommodation and Booking:
Accommodation options in these cities range from luxury resorts to budget-friendly hostels and Airbnbs. Book in advance, especially if you're visiting during the peak season. Websites like Booking.com, Airbnb, and local tourism sites can provide good options.

Clothing and Essentials:
Bring lightweight, airy clothes for the warmer months and a lightweight jacket for cooler evenings. Don't forget your swimsuit, sunblock, hat, sunglasses and comfortable shoes for exploring. If you plan on dining out or attending events, you may also want to pack a few nice outfits.

Health and Safety:
Standard health and safety practices apply, including keeping an eye on personal belongings and staying cautious in crowded tourist areas. It's also advised to have travel insurance for any medical emergencies. Tap water is potable in the cities.

Local Etiquette and Respect:
Portuguese people appreciate courtesy and good manners. When entering shops or restaurants, it's customary to greet staff with 'Bom dia' (Good day), 'Boa tarde' (Good afternoon), or 'Boa noite' (Good evening), depending on the time of day.