Yes and yes,,,,,
I have both and HIGHLY recommend going with a thread on muzzle unit for your first can....
Integrals tend to be more ammo finicky than a muzzle can.... especially on a semi auto..... they are typically tuned for a specific name brand ammo (cci stinger in my case) and can be a little less reliable with other brands/loads...... plus they cost much more (if done correctly), and really don't show their full potential on anything other than a bolt action rifle.
Shop around, but I usually recommend a Huntertown Arms Guardian to start off with ... these retail between 150-200 dollars (plus the $200 tax of course) and are a great value for the money in new suppressors..... Of course, you can get upgrade such as SS baffles ( I prefer aluminum, but i clean my cans completely after each use) or better known companies for a price.... you will, in the 6-9 month wait to get your stamp back, have plenty of time to get your barrels threaded, and a muzzle device will allow you to suppress various guns with one tax....
As for a trust.... the big benefit is that more than one person can possess the item.... (if you do it as I do, individually, only YOU may posses it, so your wife, child, buddy etc can never have it outside your supervision) the trust will let others on it share possession and sale rights to the item (same for incorporation). The problem with a trust is that they may or may not move state to state conveniently.... as an individual, you can file a form to allow you to relocate, as long as the new state allows the devices.
As for the backyard.... they aint that quiet.... if you cannot freely and legally shoot an unsuppressed 22 in your back yard, you are taking a chance with a suppressed one.... most are about as loud as an adult air rifle, and still count as "discharge of a firearm" as far as the law goes..... plus if you get a cop that docent understand the legality of the suppressor (unfortunately quite a few don't) you are in for a rough time....
good luck in your quest, try out the sites below for more info!
Jim
Major-Malfunction Holding
Bowers Group LLC's Suppressor Page
Firearms - Frequently Asked Questions - National Firearms Act (NFA) - Firearms | ATF
Gun Silencers For Sale :: Buy a Silencer Online For Pistol, Rifle, Handgun
Rundover is right about cleaning..... my integral allows me to take off the end cap, and using a coat hanger "hook" pull out the baffles to clean, then use a shotgun mop to clean the tube.... my separates are MUCH easier to keep tidy.... $.02