Suspension Questions - Again...

Hello All! New to the forum as well as the Tacoma world. I posted this over in the 3rd Gen forum as well in the hopes that I get some good feedback. Picked up a '16 TRD OR DCSB a couple of weeks ago. I came from an '05 Ford F-250 crew cab diesel, so this has been a bit of an adjustment, but I am still very happy and have no regrets that I made the jump. I have a number of suspension related questions that I am hoping you can answer.

I often tow an ATV trailer loaded with toys back and forth from CT to NH. Weight is probably at about 3250 +- lbs.

I was looking at installing Sumosprings in the rear to help out with any squat I may get. It is my understanding that others on the forum have realized a 1/2 - 5/8" lift after installing the Sumosprings. So now my questions...

1. There has been a lot written here about the Bilstein 5100s, but almost nothing written about the Eibach Pro-Truck adjustable shocks. Has anyone installed the Eibachs, and if so are you happy with them?

2. With the Sumospring installed and the small increase in height from them on the rear, is it ok to install the Bilsteins or Eibachs only on the front to level it out, or should I install them on all 4s?

3. I have read different accounts on here as to the leveling setting on the Bilsteins for the 2016 Tacoma. Should the front be set at .85, or 1.75 accounting for the Sumos?

4. By increasing the height in the front with either of those settings, will I need to replace the UCAs as well?

5. Also, I am guessing that the adjustable shock used the stock springs?

I apologize if this seems like basic info - I didn't find all of these answers using the search function, and am a novice when it comes to suspension. I guess that I am not trying to necessarily lift the truck, but just try to keep the basic suspension geometry consistent if I were to add the Sumos. Also, this is a daily driver and will probably not see much in terms of real off-roading if that helps any.

Thanks for all of your help on this!