The one who was saying that I keep an SKS in the trunk/behind the seat is me. I look at it this way. If the handgun is what you use to fight your way back to your long gun, it sounds pretty hollow if you don't really have a long gun to run back to. There may be very narrow circumstances where you might actually need it, but remember, there are very narrow circumstances where you would use a gun to defend yourself at all. Just because it's rarely if ever that you will need a gun to defend yourself doesn't mean that we are going to leave them home. So, just because it's rarely if ever that I will be able to use a rifle doesn't mean I won't be glad I had it if I needed it.
As I said before, my work limits how often I can actually do this because I go on and off post a lot. But my lifestyle and circumstances are a bit different than those of many others here. I will frequently run out to the desert just because I feel like it. I have needed to put down injured animals, and I started a thread in here last summer showing where there have been big pot farms busted in lots of wilderness areas I have been to many times. I see no reason at all to limit myself to a handgun.
The example I used before that made me reconsider a trunk rifle was the Trolley Square shootings. It was in the evening, on a weeknight, in a very congested part of Salt Lake City. When EMS was called, the traffic was so bad that very few of them got there in a timely manner at all. If I had been there, I would have made my escape. But pretty much everyone there was stuck and couldn't get out of the block at all, it was jammed up for hours. IF I had escaped to my vehicle, and IF it was obvious that there was still shooting going on inside, and IF it was apparent that the police were nowhere near stopping the shooting, and I decided to go back in to recon and look for an opportunity, I would want more than my handgun to do it. If I had a chance to shoot the bad guy from a distance rather than closing in, wasting time, and putting myself at greater risk, I would certainly prefer to do so. The chance of doing any of this is small, but again, the chance of needing a gun at all is small.
I am also in a position where my soldiers are going to be issued both rifles and pistols in Iraq. Now obviously, we would prefer to carry around pistols on a day-to-day basis. Especially where we have to sleep with them. We are in a support role where if we ever go outside the wire at all it will be with plenty of security, like an infantry platoon or more. But I still give the same emphasis to my soldiers, that if they ever really need to use force, they should do everything they can to make sure it is a rifle. If they don't have a rifle, they need to be covering their retreat to a place where they can get one.