Respect it, don't be afraid of it. I don't have a 5th wheel, ours is a 30' TT but I think you would find 5th wheels are easier. Just take it easy, no rush. Drive it around a bit at the dealer as best you can and get a feel for it. The first 5 miles you go with it are going to be a little more nerve racking than the last 5 miles of your 70 mile trip home. My guess is, by time you get home you'll be more comfortable with it. What you need to remember is the height and length for when making turns and going under trees and the like, especially if you take it to the house or whatever.
If it was just so simple it wouldn't be nearly as fun!