Hi, I have had my swag for 20 years and even took it on a similar trip to yours when I did some work out at Dalhousie Springs. A few things I have learnt over the years.

1) Yes, swags take up space, but remember they replace your tent, sleeping bag, pillow and camp stretcher/mattress, so end up being roughly the same size and weight as using a tent. Plus they are simple to set up at the end of a long day (often in the dark) and I can go to sleep looking up at the stars.
2) Have a look around at different swags, then go to a good canvas place and have one made up to your specifications (width/length) from quality canvas, mosquito mesh and zippers.
3) When you get it home, set your swag up under the sprinkler, let it dry, then repeat a couple of times.
4) Then go to Clark rubber and buy a good foam mattress at the density you prefer plus a comfort overlay (egg carton like foam stuff).
5) My only other word of advice on swags is regarding the poles you see these days. While I got my swag made before these were commonplace, I had two tabs attached to the head of the swag. At the end of the day I just clip these onto my roobar or a tree and I sit back laughing at the young blokes trying to work out where they left their swag poles or trying to fix a broken one in the bush.
The only downside for me is when I get home it takes me a couple of nights to get used to sleeping in a bed again and rolling my swag out on the floor of the bedroom is not good for a marriage lol.