OK, the rules are as usual, you will not need to enter private property to retrieve the hidden card.
Since this is a gas card, it would be counterproductive to make you drive all over the place, so it will be very obvious when you need to head to a location.
The URLs involved in this are case sensitive, so keep that in mind.
I don't expect this will take too terribly long, but you never know. I will be away most of the evening (7:00 - 9ish) so there will be no hints until then at the earliest - and I'm pretty loathe to give hints anyway.
If you find the card, please post immediately with a picture confirming in case others are still searching.
Edit: Also, PM me with the puzzle solutions as you progress, so I can get an idea of how people are faring.
OK, with no further ado, let the hunt begin!