Best way to secure Backpacks for flight check-in

Tania, The answer will depend to some extent on what type of Backpacks you're using. Are they panel-loading or top-loading Packs? Top loading Packs are more difficult to secure, as the top is usually fastened with a drawstrring. Some models also have several openings on the side. With that type of Pack, there are a few choices: > Buy a small folding Duffle, and place the pack inside that. I believe some Pack manufacturers have those, but I'd have to check. > Have the Pack "saran-wrapped" at the airport (some airports do that). That option is a bit "problematic" as the wrap can be difficult to remove, considering that cutting implements will have to be transported inside checked luggage. > Place the Pack inside a large Trash Bag Panel loading Packs are more easily secured. They have zippers which can be locked to provide a minimal level of security against "opportunistic theft". Many models designed for travel (as opposed to back country hiking) also have a "stowable harness", which prevents the straps from being damaged by airport conveyor systems (Both of my Packs have that feature). Another nice benefit is that many travel packs provide a detachable Daypack, which is perfect for carry-on. That's the method I use. Happy travels!

ask for a big plastic bag at the luggage counter and put your bag in it. It helps somewhat, and if you have something to cover the buckle of the backpack would be good. i had my buckle broken after checking in and i think somebody stepped on it.

I like buying a heavier water-proof bag to stuff your pack into. The bag will keep straps from getting caught in machines and keep your stuff dry in transit. During your trip you can use the bag to shield your pack during rainy periods or use it as a laundry bag inside your pack. REI or similar sports shops, that focus on backpacking, should have stuff sacks that will work.

Here's what you need: http://amzn.to/SSCLUL It's a bag for your bag, and it's small enough that it adds virtually zero bulk. All of your straps go in the bag so that nothing can get caught on anything.