Science fantasy campaign with floating islands, quick notes

Floating islands are cool. I want a science fantasy campaign, a big hexmap, with, like, five islands floating above it, each with its own quirks and behavior. Of course, there is Skyrealms of Jorune, I'm intrigued by it, but I cannot use settings so dense (and I envy Samwise who can grok it and runs a BRP Jorune campaign!).

Anyway, in this campaign I envision, the Referee would have to track the movements of the floating islands, which could be a hassle, but perhaps could be done in weekly turns. 

The islands would be like wildcards, most of them moving around randomly. Due to the randomness, they could crash into each other, into the ground, or tall mountains. And some islands would have environmental effects. Obv. all of them would be adventure locales with ruins and dungeons and treasure and conflict and peril.

Something along these lines:

Floating island	Movement	Special
1, Inhabited by monsters	Immobile	Weird weather magnet.
2, Inhabited by sentient beings, split into two warring factions	Controlled by dominant faction, 1 hex/day or 30 degree turn/day	Mostly functioning tech and ecosystem.
3, Inhabited by monsters	Erratic, roll 1/week	Corruption field. If the island stays on the same hex for more than 1 week, the hex becomes Corrupted.
4, Inhabited by a single sentient being and a bunch of monsters	Continuous, roll 1/week	Transporter beam. Every midnight, a 30’ diameter column of red light projects from the lower tip of the island, stays for 1 minute, then teleports everything in its reach to the island (incl. a hemisphere of ground below).
5, Inhabited by sentient beings	Continuous, roll 1/week	Crumbling. There is a chance of either a rain of small debris or a large chunk falling down from it.

Movement types:

	Erratic	Continuous
1	Turn clockwise
2	Descend 1000’
3-4	Move 1 hex	Move 1 hex
5-6	Stop
7	Ascend 1000’
8	Turn counter-clockwise

Bonus Lin Carter quote: