I knew a sleep deprived Nat would end up doing something like this. i mean...Crazyness+ tendencies to get really into it while roleplaying? it was just waiting to happen.

I didn't follow the anime, only the manga, but I'm guessing the joke here is that this filler arc is so nonsensical that it being the result of a session where everybody was sleep-deprived and / or hopped up on energy drinks is the only explanation?

Basically yeah.

I think it's less that it's nonsensical, and more that it doesn't follow the lore that was established for the setting. However the episodes were released extremely close to the time when the manga would have mentioned those bits of lore, so they might be somewhat justified in getting those wrong. One Piece takes nonsensical and runs with it, so just being crazy isn't a problem.

I actually really like some of the filler arcs. I mean, G8 everyone likes. But the short filler episodes with everyone losing their memory was good too. I thought the Goat Island episodes were pretty good too.

Especially because there's a great joke where Zoro swims in a straight line for the Merry, surfaces, turns around and swims away.

This is all just way too good. I'm seeing the filler episodes in a brand new light. And that light is filled with rainbows and puppies.

"What happened last session...?"
"I don't remember anything, it's all just a rainbow mist."

Any story of when your players is forced to use the same Plan B of Bite?

DM gentle side is showing.