All straps and buckles are not created equal. Durability and resistance to sand are critical for boating. There are various grades of webbing as well, nylon will stretch when wet, polyester not so much. Here is a good info page on strap material pro/con.
Hints and How-To's for Strap Projects - Strapworks
Western desert rivers are incredibly hard on gear. Those cheap straps you see at Home Depot are not up to the task. The straps literally hold your boat together, they are an integral structural component. Don't skimp on your straps, especially the ones that hold the frame and tubes together.
You will need a large number of straps in various sizes, I prefer to use ones that are color coded or marked by length. Makes sorting stuff a lot easier.
( I need 69 straps for my cat rig, over 30 for the bucket boat)
Straps come in two styles, regular and loop to loop where the ends of the straps have sewn in loops that you can wrap around the frame. I prefer the loop style since they stay attached to the boat and are less likely to go for a swim.
some general strapping tips...
1. When possible take two or more turns around the frame, this prevents the strap from rolling when you tighten it. Use extra wraps to take up slack and minimize loose tails.
2. Arrange straps so you can tighten them from within the boat. A lot of noobies rig on dry land then find out all the cams are pointed so you have to get out of the boat to pull on them.
3. Redundant tie offs are good, when possible get at least two ties downs to a loose object.
4. Keep the ends neat and well heat fused, fuzzy straps are a pain to thread.
the quickest way to beat up your straps is to leave loose tails when you drive on the highway. The 60 mph winds will beat them to pulp.
5. If the end of the strap is too small to get a good grip, just clip another buckle on it to give yourself a hand hold. You can tighten stuff with just a 1/2" sticking out.
6. Save yourself a lot of rigging headache and purchase an 'everything bag' or similar product. Everything Bag - Raft Rigging Made Easy - Tuff River Stuff
7. Mark your straps with spray paint to keep track of them. I spray the buckles a bright lime green. On hectic ramps gear gets intermingled and most of us buy the same brand of straps. It's easy to say 'all the green ones are mine'.
8. When loading or unloading I use a simple rule, never leave a strap loose. If you unbuckle one to remove gear you immediately replace it or loop it around a frame and buckle it, never just set it down. Loose straps will
9. Straps that pass through a routed hole or D ring are much more secure that a strap that just loops over something. You can cut holes, add D rings, footman loops or sew in loops of webbing to your gear to help with this.
Some of my old time rafting buddies don't use cam straps. They prefer military tubular webbing in 5/8" or 1" sizes. They cut to length and use bowline and truckers hitch knots to rig. You can buy bulk tubular webbing cheap on-line. I prefer straps, but this can be a good way to try out several rigs and see what size and length you need.