Ya definitely. They only have the double listed on their website right now, so when you call them up you can ask if they have any in stock. They did when I bought mine early this year. You'll be fine with that amount of weight up there. You'll definitely feel it though. I've got the gobi, tent, awning, solar panel, axe, shovel, road shower (empty usually). I definitely feel it but I haven't had problems on any terrain yet. I do fairly difficult terrain but I also know it's not a jeep nor a dedicated crawler rig haha.
Sorry to dredge up an older post but what awning do you have? I have the gzilla mounts and my tent is scheduled for deliver this week and just wondering if my taller 180 awning will still fit under the tent like you had yours.