Travel to/from Canada

I'm a US citizen, with a passport. I'm considering travel into Canada in a month or so. Forgive me if these questions should be asked elsewhere, and redirect me? The most informative-looking sites on the web seem to be many years out of date.

I'll be in Canada for a week or so at most, entering and exiting via border crossings in Idaho and/or Montana.

I won't be traveling with a firearm, or a pet, or a child. I will have registration and title for the motorhome.

I understand that gasoline is more expensive in Canada.

I'll check with ATT and Verizon about wireless services, and my vehicle insurance company about coverage in Canada.

I understand there are limits on alcohol crossing the border in both directions; can someone direct me to current info on that?

Ditto food... frozen food, canned food, packaged food like pasta.

House plants? I normally travel with one plant. Is this likely to be more of a hassle than it's worth?

Fresh fruits and vegetables? Seems like the best course of action is to have a minimum of this going in either direction, and expect that it may be confiscated at the border if the agent is having a bad day.

What else should I be considering? In other words, what questions should I be asking that I'm not?

Thanks!

Rich