Is this pack big enough to carry a 2 person...
Is this pack big enough to carry a 2 person tent, sleeping bag, 2 days of clothes and a few other essentials??
Definitely, assuming your tent and sleeping bag aren't abnormally large.
As James said it is very dependent on the size of your sleeping bag and tent. Yes if you are using any standard synthetic or down backpacking bag, if you are still rocking your snoopy bag from your youth it might not fit.
Definitely. I carry a Kelty Salida 2 in mine along with a 20 degree down sleeping bag and 2 days worth of supplies. You'll have no problem as long as you don't stuff it with a ton of luxury items. If your sleeping bag is a huge synthetic you might have some issues.