I'll soon be harvesting russet potatoes. I plan to make french fries for freezing with most if not all. Do I need to follow the instructions I see for harvesting maincrop potatoes? In particular the step to let them cure for 1 - 2 weeks? I'm looking at these instructions: https://harvesttotable.com/pot...

I believe the two weeks cure is for storing ,if you intend to use them up and freeze them the cure time is not necessary.

I'm wondering if they might have too much moisture for making french fries if they don't have a period of "curing" time? This article might be helpful:
https://idahopotato.com/dr-pot...

I made some several years ago and it seemed to work pretty good. Practically right out of the garden I washed, peeled, and sliced into 1/2 inch FF. Put them into 5 gallon bucket of cold water and soak for an hour. Drain and repeat rinse step for another hour. Spread them out on towels on the kitchen table under a ceiling fan until dry. Deep fry at 375* for 4 minutes. Spread out on table again on cookie sheets and pat dry as much as possible with paper towel. When cooled flash freeze and bag up in gallon size zip lock bags.

We bake them like any store bought frozen FF. Family liked them a lot. I am just curious if I should try something different.

Nothing better than actual experience doing it, IMO. I guess you might want to try doing some after "curing" just to compare the results, but I'd be inclined to stick with what has worked in the past.

When did you plant and at what stage are the potato plants.

If you are going to use them within the next month, curing is not necessary.

If you want to spread out preparing French Fries, some months later curing would not be a bad idea.

At that , Russets are one of the longer lasting potatoes in storage.

I planted Mar 20 so today is 130 days. The plants are starting to die away. I planted 2 30 foot rows of red potatoes and 5 30 foot rows of russet. I have dug up all the red. Got some nice spuds. A couple of weeks ago I went too far in and got the 2 russets in the pics.

I'm not sure I want to start making FFs right now anyway. It's over 100 degrees today!