1) You are correct that the manual is confusing and not entirely accurate. They had steering locks until about 2008 (or so). They did not revise the manual to reflect the change. Additional confusion added due to a limitation that you cannot tow (via tow-truck) a Wrangler with only two wheels on the ground. Personally, I think this is false, but no big deal getting a flat bed tow-truck for times when Chrysler's quality problems sneak up on you.
2) The 2010 has two 12v power ports (cigarette lighters) on the dash. One is switched, the other is always on. Use the always-on one for your brake buddy.
3) Trust the advise of people who have experience with the same vehicle, and there are many. Wranglers are one of the most popular toads for good reason. With mine (2010 Wrangler), I made zero modifications other than installing the wiring harness and hitch. I put the transfer case in N, transmission in P, key off and into my pocket and lock the doors. EASY.
One caution about locking the doors. Don't use the key fob if you have an alarm. Nothing like driving down the highway and hearing a faint car alarm going off (did that). We laugh that the Wrangler was telling everyone that it is being kidnapped.
