what I've done in the past:
Go to your local motorcycle shop, specifically the service area. Ask if they have any extra straps from shipping bikes. Maybe you'll get them free like I did, maybe you'll pay $10, best to have a few dollars to encourage them.
If that doesn't work, go get some ratchet straps from Walmart. They're like $20 for four straps.
When strapping the bike down:
a: Figure out how the ratchet straps work before you need them.
b: Enlist help, have someone sit on the bike straight up. One strap on each side of the front, you don't need the canyon dancers, but they don't hurt.
c: For extra care the back can be strapped down on each side, use the passenger pegs. However, one strap all the way through the wheel, one side to the other usually works.
d: Put your bike in gear, and leave the kickstand down even though the bike will be upright.