Few additional thoughts off the top of my head...

If you're going to feed your whole panel (which I recommend if you have half a brain...) make sure to get a 240 volt panel so you can likely use everything you have (not at the same time). You might want to turn off circuits you don't need or can't run at a given time.

Consider a soft start for your air conditioners to make it so a smaller generator can start them. Many of these have to "learn" with grid power so install it before you need it and know soft starts can fail. Have a spare contactor and capacitor(s) on hand. (ask me how I know...)

Agreed, never back feed, never use a suicide plug. But if you're goign to do a portable generator consider a generator interlock (not legal in Canada) or a generlink. Both are usually cheaper / easier to install than a manual transfer switch or a generator sub panel.

While I agree portable open frame generators aren't meant to be run in the rain, and elevating them (for snow and flooding) and protecting them from rain / snow is advisable, I note that I see open frame generators mounted on trucks every day and I'm pretty sure the guys that use them work in the rain and snow. I have in fact run open frame generators in the mud / rain on constructions sites. Is it great? For sure not. Dangerous? Probably. But you have to weigh safety risks and risks to equipment yourself.

Finally, regarding fuel, in my opinion by far the best fuel is diesel. Safer, potentially very long lasting if well stored, and energy dense. If you have an oil furnace you can probably run your genset off of that oil.

If you're going gas / portable, consider a tri fuel, especially if you have natural gas at your primary use location. Duel fuel worth considering too. Even if you plan to use natural gas (why wouldn't you) or propane, have at least two portable five gallon cans on hand in case you have to rely on gasoline (or diesel above).

I love the NATO Jerry Cans but fuel cans are a personal choice and I trust you to pick what works for you.

I personally have 15-20 gallons of gas on hand at all times and I am prepared to ramp up to 80+ gallons if a storm is forecast. I treat it with a preservative that should keep it working for a year (with Pri-G I can retreat to make it last longer, in theory) then I burn it in cars every six months. The preservative is a safety net. In addition, a portable generator is my second form of backup power if my solar / battery system can't keep up.