Buy a really light rope, leave any quickdraws at home and just use spectra slings, heres the kicker:
Tell your partner you'll carry the rope and the slings if they carry the tent...hehehehee. It works every time. I've never had to use more than a 2700 cu. inch pack, even for overnighters in winter. However sometimes it's been tight, I've been thinking about getting a 4000 cu. inch pack for when it's my turn to carry the tent. I've been looking at:
Osprey Aether 60, 3 lbs 6 ounces, 3700 c.i., $200
Cold Cold World Chaos, 3 lb 7 ounces, 4000 c.i., $245
*** Arc'teryx Khamsin 62, 2 lb 4 ounces, 3790 c.i., $260 ***
Good luck.