I cannot help with the bilge; I have never needed to clean mine. The boat's bilge stays dry.
You can skip the anti-salt portion if you boat in fresh water.
FWIW - this is what I do:
After I come back in, the boat is moved from the water to the wash rack by the forklift. I then spray down the interior (including the clean out port and plug) and hull with Salt Off (West Marine's version of Salt Away) using a garden mixer on the end of the hose. I do not think the maximum mix rate is equal to the mix rate in the flushing unit, but it is enough to remove the salt from the interior and exterior. After I spray it down, I flush the engine with Salt Off for about 5 minutes. During the engine flush, the Salt Off solution is working on the interior and exterior of the boat. During the engine flush, I usually but not always get a weak stream out of the pisser. I am flushing the engine within 15 minutes of coming out of the water, so it is still hot.
After I finish flushing the engine, I wash the boat with a good quality wax and wax soap (Griot's or Meguiars) using a soft blue bush on a handle. I then rinse and dry the boat; I dry it with a few microfiber towels (inside and out not including the non-skid floors).
I do not use the Yamaha silicone spray. Instead, I use Corrosion-X on the engine and electrical components in the engine bay, the electrical connections behind the curtain inside the console and all hose clamps. I spray all of these down each year - just once a year. When I had my annual service in April, the Yamaha Tech told my salesman that my engine was the best looking 2.5+ year old engine he has seen.
If I see any hint of rust on any of the hardware (for example a screw head), I spray it with The Must For Rust. I just leave it. It removes any rust and leaves a protective coating.
I polish and wax the boat's hull once a year with Griot's One Step (a synthetic paint sealant and polish all in one). I pick a day that has little activity at the marina, so I can keep it on one of the 15 wash racks for as long as I need. I apply the Griot's with a random orbital buffer using a medium cut pad (to remove the old wax, water spots and any minor blemishes). I wax the interior surfaces (not including the non-skid) by hand with Griot's Poly Wax (synthetic paint sealant). I clean and protect the vinyl 4 times a year, and I use Non-skid wax on the non-skid twice a year (warning - it does make it a little slippery for a week or two). I also use metal polish on the rub rail, wheel and etc. once a year. Finally, I polish and wax the windshield every year.
The boat looks new.
The Griot's lasts for a year without refreshes or detailer. The boat is stored in a partially roofed open rack.
This is after one year.
This is just polished/waxed.