With quick release wheels it's surprisingly easy to toss full size bikes in a trunk. However, in this case, I think both would be viable options (full size or folder) I think the curve is a good choice.

On a side note, does the 1-1.5 miles away parking area at a fixed location? or is it variable (ie. you have to hunt around for a parking space) I only ask because another option if you have a full size bike you're not too worried about, is to ride it back and forth and lock it at both ends of the ride. (parking area and at work) Just another option!