Crawfish Boil Advice for Non-Cajuns

I’ve got a 100 qt pot and around 40 guests, mostly first timers just looking to try crawfish for the first time.

I’d appreciate any advice for how many pounds to cook and how to split the batches. I’ll have the usual sides (corn, potatoes, mushrooms, sausage) to fill them up.

I’ve read 3lbs per person, but if anyone has firsthand experience, please let me know. With this group of Yankees, even that seems high.

Thanks in advance!!