Perhaps not the "sensible" choice, but should be perfectly good for the journey. Plenty of people have gone on much more poorly suited bikes. Ask Ted Simon.
BUT if you're thinking of modifying the forks, and other "fiddly bits" you're heading in the wrong direction.
I might fiddle with fork oil and springs to get it right for the me and the load, but change the forks? NO WAY.
Keep your mods simple and basic, do what must be done, like beefing up the rear subframe to carry the load, install a good rear shock tuned for the job, perhaps change handlebars to a good touring shape, add a windscreen, learn how to maintain it yourself, and get some miles on it in touring mode to test it out.
If you want to get into major and expensive mods like forks and such, you should be thinking a different bike.
KISS principle here - "Keep it super simple!"
It's a nice simple clean bike - keep it simple.
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