Especially at POFQ, there's NO WAY I'd pay more money to arrive earlier solely for the reason of room selection.
POFQ is a pleasantly compact resort. Nothing is far from anything. You can't fully appreciate this until you see it in-person.
But in case you've never seen a map, check this out:
http://www.wdwinfo.com/resortmaps/portorleans.jpg
Before my first time at POFQ, I was very much like you, very determined to do everything I could to plan for the best possible room location. Knowing that the easier the request is the more likely it will be granted, my only request on the reservation said something like "close to food court and bus." That's all I really wanted ... I wanted to have a conveniently-located room to minimize the walking, especially for our 6 and 4 year olds.
We booked a late flight, and didn't arrive until about 11:00 p.m. Near the end of the check-in process, I was disappointed to see the CM's markings on the map to show me where my room was. It was at the far end of Building 2, which, when you look at the map, looks pretty far from everything. I was disappointed but didn't ask if there was anything else, since I figured if it was really bad we could make a change in the morning after some people check out.
It was 11:15 p.m., I had 2 exhausted kids and an exhausted wife, and I resigned myself to a long trudge to the room in the dark.
I was very pleasantly surprised. From the front desk, the room was, and I timed it, a 2 minute walk. And that includes the elevator ride to the 3rd floor. I LOVED our location, even though it looks out of the way. It's because the resort is just so darn small!
Later in the trip, I timed the farthest walk I could figure, from the far corner of Building 1 (at the top and right of the map) to the food court: 3 minutes 20 seconds. The longest walk is 3 minutes 20 seconds, for the most "inconvenient" room.
Outstanding!!!
I went to all this trouble to try to help you realize that it's truly not worth stressing over room location at POFQ, because there's just no such thing as an inconvenient room.