Hi Paul,
Yes, that makes sense to me, I pack my 50 lt GoLite Jam in a similar fashion:
- Soft items like spare clothing, down jacket in a dry sack at the bottom of the pack, along with a rolled self-inflating sleep mat.
- Sleeping bag on top of that in another dry sack (will now be the eVent compression sack).
- Cooking stove and mug on top of that, along with camp food and other oddities.
- Tent in another waterproof compression sack to stop it wetting stuff further down, but also allowing me to get it out first when arriving at camp leaving everything else until its set up.
- Waterproofs pushed down the front of the tent to force the tent backwards in the pack, closer to my back.
- Snacks and water in external pockets.
The beauty of the GoLite Jam is that it has roll-top closure, meaning that any remaining space can simply be rolled up, effectively leaving no space at all.