Wow. It's called basic organization skills. I'd hope you do the same INSIDE your house, where you keep pots and pans near each other and in the kitchen (not under the bathroom sink or scattered through the house).
Like with like. We keep ALL of our decorations together, but we don't have a whole lot. If you have enough to fill up storage containers for each holiday, then use a dedicated storage container (plastic bins/totes) for each. Label them. Keep them organized so when you want to decorate you only have to go to one place, grab one or two boxes and be on your way.
Skiing gear all goes together. Skis and poles hang on a wall, shelf near them for boots/boot bags/goggles/all the other clothing junk that goes with skiing:
Snowmachines are a Little more complicated, but designing off-season storage for them will make it a lot nicer to use the space as well. Again, keep your gear with them, helmets, riding suits and 'stuff' in a storage container with the machines. Plenty of options, but here's one:
If you have vermin problems and would rather keep the fabric items inside, then do so. But, again, dedicate a space and keep it all neatly organized so when the season rolls around again you're not hunting for a lost boot, or cursing because goggles were accidentally crushed.
Any item you have to store, you can just type into a search engine "
**item** storage ideas" and get dozens of ideas. There is no one "right" way, though there are usually better and worse ways, which I'd think should be plenty evident to anyone who gave even a brief moment to think about it. This isn't rocket science, it's just keeping "stuff" out of the way in a neat fashion.