Well first with the "CCR" im not sure if the trust will work i dont see why it wouldnt, and i know they are actually very easy to get and have and they are cheap. Its all in if you want to keep records of what you buy and sell, collector wise. I was thinking of getting one as i have seen a good amount of older collector pieces i would like to have. And sent directly to my house.
Now for the the "CLEO" i think it stands for Chief Law Enforcement Officer, as in the local polce chief or sheriff.
Now using the Revocable Living Trust you dont need to do anything besides print a free one off the computer useing quicken willmaker, then fill it out and go to your local bank sign it and have it notorized, no hassle, no running around. This avoids one fo the other two possible ways of doing it. One being you have to get the CLEOs signature which i have heard can be a pain. Plus its none of there business on what you have and what you want to do, my personal opinion. IT can concern them, when and only if i commit a crime, which i dont plan on doing., for the record.
I know the trust is good for all "NFA Weapons" like for my silencer, short rifles, short shotguns, Full Autos, and Explosive(Destructive) Devices. There may be a few more.
Like if i wanted to take an AR upper to a gunsmith and have it shortened to a SBR then i would need to do this paper work and send in the money to the BATFE and when they send the paper work back i can leagally have it.
There is also a FORM 4 you fill out which is the paper work that has the serial numbers, purpose, etc. on it that the ATF will use in there paper work and they will send you(at least one copy) back which is yours and then you maintain that somewhere safe, then also keep one with the NFA at all times for legal purposes.
If you use the living trust you also need to send in a proof of citizenship form which i have if you need i could try and email to you, if you cant find one that is as simple as a signature if you are a citizen.
Off the top my head that is everything i can think of.