I don't think you need anything too special. The basics should do.
I personally like setups where the strap ends can be secured, rather than just holding on with a hook.
Take a look at these...(or check out other stuff on the site)
https://www.etrailer.com/Tow-Shackle...w/MT70029.html
https://www.etrailer.com/Tow-Straps-...n/EM59798.html
https://www.etrailer.com/Tow-Shackle...Up/CU63XR.html