Silvertwinkie is right.
You should get a "complimentary" box of stuff when you pick up your trailer. It has, amoung other things, a ten foot lenghth of sewer hose some fittings, and even a few packages of black tank treatment stuff, a few rolls of TP. Your dealer should help you out on this one.
Also, in your collection, you should have an electrical adapter that goes from RV 30AMP to 20AMP (household style). Some campgrounds have 50, 30 and 20 amp service, but others just have 20amp. There is a whole shopping list of stuff you can find on this forum to set you up nicely.
As it has been recomended by others, it is always a good idea to have one or two extra lenghth of sewer hose, just in case 10' ain't long enough, or a hose develops a leak.
You must be excited!!!!
Sometimes I wish I were living in the stone age. Then I would know I'm the smartest person in the world.