A:Keeping gear dry on the water is important, but it's not difficult. Your waterproofing options run from super low-tech—garbage bags—to exotic shock-resistant cases.
Stuffing gear into a garbage bag and cinching the top will give you protection from rain, spray, or even a quick dunking, provided the bag bobs with the cinched end up. Garbage bags also come in handy for storing shoes, dry socks, or packs when there's s a chance of rain, and they'll even help with actual garbage. I recommend traveling with several.
When the risk of total immersion is high, you'll want to invest in a purpose-built dry bag. On excellent option is Sea to Summit's Big River Dry Bag ($25), which has eight liters, or almost 500 cubic inches, of capacity. That’s enough for a sleeping bag, clothing, or a tent. The Big River Dry Bag is a classic roll-top bag made from waterproof material, and to seal it, you simply fold the open end as if you were rolling a towel, then cinch it with a buckle.