One thing I'd recommend to help with the minutia - it sounds a lot more complicated than it actually is - is coming up with some kind of record sheet. I think there's a spreadsheet for download, but I'm actually using pen and paper to track opportunities and LTH Rewards.
I'm playing my Dynasty in Riverview, and it's been a nice change from Sunset Valley. One thing about the town itself - if you check the Real Estate section, you'll find that there's only seven Properties to buy. There's a standing exception to the "No Edit Town" rule to allow you to place one more purchasable Property, even if you aren't placing Late Night or Ambitions content - or, if I'd thought about it/known how to do it, there's one venue called the Watering Hole that can't be purchased in the "vanilla" town but would be awesome for renovation, if you can figure out how to make it purchasable.
Also, I think there's a routing problem similar to what people have mentioned in China from WA - sometimes the game will get laggy/choppy, and resetsim * will usually fix it. I haven't actually found any people stuck anywhere, but the map is really big, and I haven't put that much time into searching.
The place to find Deathfish is not as obvious as it is in Bridgeport or Sunset Valley, but the Guide page on fishing has pretty good instructions on how to find them. The only place to find saltwater fish is at the Fish Hatchery, which is actually kind of convenient - all the different spawners are right in one place, so you're not running up and down the beach looking for that one kind of fish you're after.
There are harvestable plants all over the place - it's supposed to be a farm town, so a lot of the townies have gardens, plus there's a community garden. I can't think of anywhere that has an Omni Plant, though.
If you're after another roomie or two, Norman and Elaine Joy have a really useful skill set. Norman can plant Special seeds right from the outset, and Elaine's a Natural Cook.