Yes. Those fine folks at Cadillac did something really cool in 2010. Right under the shifter boot (accessed by curling your fingers at the back of the boot and lifting, you will find a small, white, recessed button (upper right under boot). If you hold down the button it will release the transmission lock and you can shift it into neutral without the ignition on. Viola - that's it - you're done. Just make darn sure you get it in neutral (next to last position) not drive, as you will not have any indicators to tell you where you are. When you arrive, shift into park and start the car as normal.
As there is no steering lock, you don't have to leave the car in accessory position or anything. No battery drain except for any brake system you install. No fuses to pull. You can find the info in your Cadillac owners manual and it specifically refers to "four down recreational towing". If you can't find it, the dealer can print a service bulletin that specifically refers to it.
BTW, Blue Ox installed our tow plate on our 2012 SRX and it is remarkably tidy and unobtrusive.
From what I've read of people's experiences with other cars, this is remarkably simple. And you get to drive a Cadillac
One last thing - when you look at brake systems, be aware that the only accessory socket that remains "hot" 10 minutes after the car is shut off is the one all the way at the rear. So if you need a 12V socket, you'll either have to run a new one or buy a LONG extension cord.