If we go tomorrow, we should plan it today

Scenario: We are in Oxford and we are thinking of visiting London tomorrow. Is the following sentence logically correct?

• If we go to London tomorrow, we should plan our trip today.

I tried chatting with some AI models and most of them answered that it's logical and that native speakers use this form but it sounds illogical to me compared to something like:

• If we go to London tomorrow, we should visit Hyde Park.

The sequence here is coherent because once in London we can visit Hyde Park. But in the previous sentence, if we go to London we can't do the planning in Oxford because we already left it. So my take is that in such a situation the correct sentence would be:

• If we are going to London tomorrow, we should plan our trip today.

Is my analysis correct or it's just an idiomatic formulation?

Thank you for help in advance!

The form with "If we're going" is good English, and well expressed. If you are writing an email, you should use that version.

But I don't see anything very wrong with "If we go...", and I'm sure examples similar to both could be found.

A somewhat more formal version is also possible: "If we are to go to London tomorrow, we should plan today."