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For the IPWR I'm using a Hope V1 as main light. I get two full nights off 4 AAs so it got me round PBP without needing spare batteries.
It's not as bright as a dynamo but I'm not going that fast and it's good enough as I'm not used to anything brighter. I have a higher power light for descending, bad visibility but it eats power so use sparingly.
You could use a dynamo, but you certainly don't need one.
I'm getting the vibe that some long-lasting blinkies plus something like the exposure strada will probably be enough? Plus a big power bank.