I purchased REI Grand Tour 80 for my upcoming trip to Ecuador & Peru. It’s perfect. It has roomy detachable daypack, organizer panel, and a soft neoprene sleeve to hold small laptop/tablet. The main bag can be opened all the way. There are various compartments within the bag which are great for organizing.
Lonely Planet’s guidebooks are a must for backpackers. They provide detailed information from History, places to eat, sleep and party. One of the best and my favorite feature is small city maps within the book (some have pullout maps); it’s easy to navigate and incredibly useful when you are without a smartphone.
I do not carry a laptop with me. It’s just too much. I have my iPhone 6, which is capable of doing almost anything. Plus hostels have computers available 24×7 for you to use, so I don’t see the point of carrying that around. But to back up my photos constantly, I have a WD Passport 1TB drive. I can easily transfer photos from my camera to the drive and leave editing for when I am home.
This is a powerful little charger. I purchased this for my last trip, and it was incredibly handy. I got about two full charges for iPhone out of this. I highly recommend this for light travel. You can purchase it for $13 on Amazon!