This is what I'd do. I'd try the TCTP aimed specifically for the Palms Springs Century. I'd take 6 weeks "off", meaning riding same volume low intensity stuff. That should give you plenty of time to recover if you're fairly young and/or in pretty decent shape to begin with.
Then crank it up again for the Wildflower. I bet you could do it.
I'm reading the TTC right now but have never actually done it. My informal goal is to try to do three pretty tough centuries this year. I could give you better advice this time next year.
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Momento mori, amor fati.