Replacing factory HU with aftermarket HU in 2015 AC

I've been surching this thread for the past 5 days and thought someone had a cheat sheet of required connectors and parts needed to do the swap and now I can't find it. I am changing out the Head unit, front speakers, adding a amp, and a subwoofer. I know there are like 2 main harnesses but which one is the best one to use? What other connectors/adapters (part numbers) do I need to hook up all of the other factory items such as steering wheel controls, USB/3.5mm jack, backup camera, and antenna? Best place with best prices? If I missed something please let me know. Does anyone know how long the RCA's wires need to be to go from the HU to the amp that's going under the drivers seat? I just want to buy all this once so I can get it done in one day and get the all the items needed without buying something I thought I needed but I didn't, waisting my time and money. I have a 2015 Access Cab. I already have the component speakers and adapters for the doors, the amp, the sub and sub box. I installed the sound deadner last year and did the whole interior. Any help would be appreciated

 

I was looking at doing a full system in my rig before. Mine is a 2014 but I think the adapters needed are the same for your 2015.

Here is the link to the application guide:
http://maestro.idatalink.com/

Looks like you need the Maestro RR, TO1 and UTO2.

I think this is the antenna adapter.
http://www.metraonline.com/part/40-LX11

Depending on how you route the wires you might be able to get away with 3 meter RCA cables if mounting the amp under the seat.

 

Thank you @loginfailed.