Some have placed orders through Granger who was offering $1,500 over invoice. Zach there posted a few weeks ago that the cut off for Platinums, Limited and F-450s was November 16th. Haven't seen anything for King Ranch or below.
With order banks opening on 10/27, you may face a few challenges - Ford has received 100K+ orders, so you'll be pretty far down the the list placing an order at this point. With Tremors accounting for 5% of the annual production, your order might not get picked-up. That said, there doesn't seem to be any real queue and orders seem to be picked-up almost at random (assuming you don't have any options that are under constraint). A King Ranch and above trims won't get scheduled until Ford starts working on Job 2, which is starting in Spring. Dealers can take a King Ranch and above order now, they'll just code it with a priority code 99 until job 2 production starts and then you'll want to get the dealer to change it to a priority code 10 up to 19 (lower is supposedly better, but that is not absolute). The 99 code means the factory won't schedule the order and allows you to finalize options for the items that are currently not available to include in a build configuration (e.g., Black Appearance Package).
My recommendation is talking to your local area dealers about placing an order. Most won't accept any special pricing (e.g., x-plan) for a custom order, particularly a Tremor, but some on the forum have been successful with getting this pricing if that's available to you. Most dealers will sell an order at MSRP, but that is not universal as other forum members have been able to negotiate pricing down or found a dealer like Granger who is offering a deal on an order (Granger's allocation is spoken for and there's a waitlist, so don't waste time there).
Speaking of allocation, you'll want to discuss with the dealers you speak with what their allocation is for super duties and how many orders they have, and how many they're planning to receive each month. For example, if the dealer has an allocation of 120, they'll likely receive about 10 trucks per month on average. If they've taken 120+ orders, your chances of getting one through that dealer is limited and will rely on either someone canceling their order or not getting picked-up due to constraints or Ford's seemingly random selection of orders.
Once you get an order placed, you may (or may not) get an order confirmation email from Ford. Just make sure your dealer has your correct email address in when they place the order. Most of us have received the confirmation, but there are a few who haven't. At that point, you'll want to check-in when you see posts or news that Job 2 is being scheduled to confirm the details of your order with your dealer so they can change the priority code from 99. Then it is just a waiting game from there (be prepared to wait a really long time).