I just bought the game 2 weeks ago, chose the riverland farm first save but so far I've loved it. I don't mind the scarceness of the lands, I prefer it over the wide open field of the regular one which I used for my second file. Sure, the asymmetry of the islands can be a bit annoying but it does lend for more creative designing. I think advantages you could use are crab pots - especially if you chose the trapper profession - and rice shoots. since they don't need to be watered if you plant them at least 5 tiles away from a body of water.
This is my swamp farm so far (excuse the cutout buildings, I'm really new to farm planner and I'm playing in the switch). What I would do differently is to place the barns and coop on the mainland to make use of the dead space next to the greenhouse, otherwise I'm a happy camper :3
EDIT: Using a helpful post in this forum, my pea brain has finally found the rendering button in the planner.