For vehicle carry, I have found a single-strap shoulder holster, like that shown here in post 15
http://www.freerepublic.com/focus/f-bloggers/3462495/posts?page=15#15
to be both secure and easy to reach from the driver’s seat. Depending behind the back of the passenger seat, it can be covered by pulling an interior-matching T-shirt over the seatback ‘to protect it from dirt & fading.’ Worried about the strap or holster printing thru the thin fabric? You can hang a light jacket over it instead. You want to be prepared for the occasional weather change anyway, right? My friends in FL were shivering one spring when it dropped into the 40s, LOL.
Notice that the one pictured can be easily detached from the strap for portability or temporary storage elsewhere, while leaving the strap & camouflaging attire in place.
It’s one more step while entering/exiting the vehicle, moving your weapon between the truck holster & the one you’re wearing, but it’s an option. I’ve become inured to driving with a belt-mounted multitool at the 6-7 o’clock position, & years ago wore a small Sat-nite special at small-of-back even behind the wheel.
Thanks. That looks like an option.
40 degrees here in Florida is winter weather. This is no exaggeration - I’ve seen people in Parkas and shorts when the temperatures drop into the 60s around here.