My typical weekend will look like this: Saturday early in the morning (between 7 and 8) my friend will pick me up at home. Than we'll drive 3 to 4 hours depending on where we plan to hike, arrive in a nice Belgian village, park the car, enter pub/restaurant/cafe, have something to eat.
Than the rest of the day until dark we hike, depending on the season we can stop as early as 17h or hike until 20h, whenever the sun is setting and there are still a few minutes of light left to pitch the tarp.
The next day we try to wake up before dark (but we don't always succeed) and start hiking at the first light of day. Than we hike back to the car, where we try to arrive around lunch time (13h) and have lunch in the pub/restaurant/cafe again and drive back because we both enjoy our Sunday evenings at home, to unpack, kiss the girl friend and relax a bit before work starts again the next day.
This is anything but a wilderness trip of course, but there is none of that close to where I live, but it doesn't really matter because the Ardennes hills are still a great place for a hike and I really don't mind passing through a village after two or three hours on the trail and have myself some coffee and apple pie. :D
So I agree Mark, pack weight should vary based on the goals of your trip and indeed my pack weight certainly does. Still I see little point in carrying a sub 3 # pack on a high mileage weekend trip, but sleeping uncomfortably. I'd rather add half a pound and sleep more comfortable.
However I have no doubt that any sub 5 pounders here on this forum sleeps perfectly well on such a trip. Maybe I still have to figure out how. But typically my weekend pack weighs less than 10 # (and this is no base weight, this includes water, the fresh(er) food, canister stove and the trekking poles that spend most of their time strapped on my pack, tho it does not include the whisky cuz that's my friends job). And I find it perfectly comfortable at that weight and find no need for it to weigh even less other than the kick of knowing your pack is ridiculously light.
Last Easter I did a lake loop as well (in Luxembourg). This trip we did in three days and is about 44 miles and about 11,300 feet elevation gain, which I did with my UL kit and at the end of these tough days i was really happy with my 'luxurious' TAR Z-Rest cut off. I think that with a lighter mat I would have not gotten the needed rest at night, but as I said before, maybe I still have to learn.