There is a lot of mystery and closely held secrets around getting pre spawn and spawning kings to bite on a consistent basis. While around for years, a relatively unused tactic in many locales now being adopted by savvy anglers is float fishing for salmon.
In a nutshell, you are rigging up cured, fresh or artificial spawn to float downstream under a float similar to how you might target steelhead.
We have spent a lot of time working with a number of our guides who are aficionado's when it comes to float fishing in general, and got a great look and helpful insight into taking big kings under a float.
For the most part, if you have good access to fresh skein, that is without a doubt the bait of choice. Soft beads in larger sizes like 12mm do also work, but fresh skein either river cured or brine cured in bright red coloring takes the cake.
The setup is pretty simple, but you are going to need a float rod with enough backbone to handle 20lb+ kings such as the Iridia Float Rod. Reel selection can range from spinning outfits, baitcasters such as the Shimano Corvalus 400, or the ultimate float fishing reel..the centerpin. If you go with a centerpin (which we highly recommend) look for a 5.5" diameter reel that allows you to put line back on the reel the quickest due to the larger arbor. There are advantages to each of those choices, most comes down to personal preference, but by far the centerpin reel is the ultimate float fishing reel to maximize your effectiveness and experience of fighting a king under a float fishing setup.
You can also go a couple of different ways on mainlines. Some do prefer a 30lb braid mainline, while others like to go with the stretch and shock absorption of Blood Run Tackle Floating Mono Mainline, with the nod going straight at the 23lb floating mono mainline.
The rigging is simple, a small inline ball bearing swivel from the floating mono mainline tied to a short section of 15lb fluorocarbon leader. Put on some splitshot or inline egg sinker style weights, and tie egg loop drop to your hook. We do prefer something in the 15gram (3/8oz) range for a sliding egg sinker weight which can get your skein chunk down quickly.
The number one preferred hook options for float fishing for chinook salmon by far and away is the Skeena Hook from Blood Run Tackle. It has a slight reverse eye perfect for snell or egg loop knots to hold your skein, and a slight reverse bend for better hook sets on hard mouthed kings. 90% of the time you will be using either a 3/0, 2/0 or 1/0 size Skeena Hook.
When rigging up your bait, there are two primary options. First, chunk cured skein wrapped into your egg loop is going to be an obvious choice. It is quick, easy (and messy!) but always a great place to start. Another option is to take a skein chunk and wrap it into a spawn sac to create a golfball size hunk of skein.
For some reason, as noted by our guides, the round compact shape sometimes seems to hold scent better and longer, and gives the option of wrapping in different colored netting to add some flair. Chartreuse and Pink sac material get the nod here.
It is important to note that when fishing cured skein or roe, you have to keep it fresh and "juiced up" with scent to keep it appealing to wary kings. The thought behind taking these pre-spawn fish, though not actively feeding, is that kings trigger on protein based scents that their bodies crave in order to keep them nutritioned enough to last throughout the run up to the spawning grounds. Though not triggered by hunger, a forced intake of protein in the form of skein proves to be the ticket to getting these fish to hit. Many believe that all salmon are hard wired to "destroy" the offspring of other fish, and readily inhale any loose eggs during the spawn as well....which is why larger beads can work here too.
This is not a "lining" or "flossing" event where you feel your mainline run through the mouth of a fish and heave your way into a snagged fish. These kings are actually inhaling these chunks to quickly digest to get that protein their bodies need. Krill based scents in both cures and artificial egg clusters seem to entice more than other scents.
Working deep holes not covered up with rolling fish is the place to be when targeting these fish. You can pound on them all you want up where they are spawning, but you will rarely get them to go. Where you don't see them, in shady deep holes and runs, is where you will have the best action.
We love float fishing for steelhead without a doubt, but by far the most exhilarating species to target are pre spawn and spawning chinook salmon by floating skein or eggs under a float on a centerpin reel. They call them kings for a reason, and pound for pound under a float they are the hardest fighting fish around.