Well, it's easy to hook a fish, getting it to bite is another story.
The Vedder river is a notorious black hole of salmon fishing. It's a river that is incredibly easy to access and fish, there is something like 50+km of fishable river. It has a good run of all five species of pacific salmon. It's possible to 'grand slam' on the vedder, though I've never done it. Because of this, it attracts huge crowds and often inexperienced but more so ignorant anglers. Locals refer to them as a "beaks." It's quite the insult to be called one, even though the biggest beaks have no clue about their low status. Being a newbie is not the same as a beak, but often newbies learn from beaks, which turns them into beaks and they don't even know it.
Anyways, you want the fish to bite your hook. You don't want to snag fish or the bottom constantly. Float fishing is the best way to do this, but even still a lot of float fishers don't know what they're doing. It's an art that takes a bit to master. Reading the water is not that easy. The basic idea here is that you use a float to suspend your presentation (usually a chunk of roe) about a foot above the depth the fish are holding at. You want your float riding vertical, about 2/3 submerged, with maybe a 10-15 dgree tilt upstream. If your float is laying flat, you're doing it wrong. If your float is riding too high, you don't have enough weight. It's a balancing act, and takes years to perfect. Anyways, the fish will see your presentation, rise, bite your presentation and your float will sink rapidly. Set the hook and it's fish on. A slow sinking float is usually a snag. If you're snagged on the bottom, you're doing it wrong.
Beaks however don't give a **** about any of this and only care about shouting "Fish on!" to anyone who can hear them. Then hoot and holler, dragging a fish in to shore like some kind of rock star. So they will cut corners and have some questionable practices. On the Vedder, often it's the dippers. These guys will stand on a rock and pitch a piece of wool on a hook through a shallow pocket in faster water, eventually lining it through a fish's mouth. Some will wear polarized sun glasses and watch for the fish to swim by and then 'dip' for them. Go to the Tamahai bridge rapids for examples of this behaviour. Its not really 'fishing.' For the most part, you will see guys out there with floats, using brightly coloured wool yarn tied on to a very large hooks, drifting this rig through a run. They get to the end of their drift and RIP the line before they reel in. The rip is an effort to drive the hook into a fish's body after the line passes by. Anyone setting the hook on every drift? Sure sign of a beak. A good presentation suspended by a properly balanced presentation, rides the river bed will never need this behaviour. The only time your float should go below water is from a bite.
The early season on the vedder, before the rains come, is a tough one. Water is low, fish are holding and get broody and lock jawed. There are still biters, but it takes a bit more effort and nuance to really get them to engage. At the same time, September is your best chance to get that nice bright silver Chinook you've been dreaming about.
Good luck & tight lines.