They won't approve Willie Nelson for sure, unless you get his permission. I wouldn't bother submitting. Kate Winslet gave hers. They didn't need it for Oprah Winney. Alter it a bit if you like it. Soundalike doesn't generally work, especially when it's so obvious with Will E. Nelson. I don't suggest Nelson's Willie. Sounds dirty
Maybe
Wiley Nelson. Sounds like he's being sneaky, but also a play on Willie's name. Not too close to be a problem. What's your mare's name?
For something a little more typical playing with the names you get things like Joy's Prospect. Something with King and/or Country in it isn't out of place. Maybe Ode to Willie or Ode to Nelson. If you wanna slip a slightly naughty one in--Folked Up. "It's Folked Up on the rail..." If they aren't big on properly getting that syllable out, could be fun, esp. for Trevor Denman.