Well I took the Greyhound in the end. Problem is that they charge $10 for a box (actually this is not the problem, but a good price) and $25-35 to check the bike in. I gambled and did not check it in, hoping the driver would be sympathetic. I received the: "ok, I'll do it this time, but next time check it in". Pleased to escape that extra charge!
The bus ride was awful! A constant din throughout. But not much compared to 95deg heat and 10-15mph headwinds on the bike from Sanderson - Del Rio. I'd never go near the southern tier route until temps are guaranteed to cool. The thing is that the heat lasts 12+ hours - it doesn't subside! Really not recommended.
Aggie. You were spot on with your comments. I absolutely loved west Texas - the open roads are so quiet and the Davis mountains beautiful. Plus all the wildlife is immense. Like you, the most I've come across, even vs Australia. So many grasshoppers!! Birds and butterflies everywhere. I caught sight of Deer, Elk, a Tarantula being paralyzed by some large insect, dead snake eaten by turkey vultures, as well as wild pigs, an armadillo (dead) and more. Really pleased I did not skip West Texas, EXCEPT, I would definitely not recommend Sanderson to Del Rio. Not only was that my headwind section (10-15mph in my face), but the scenery was very flat.
Looking for a ride share on craigs list now, from Austin to New Orleans, then cycle the rest to Florida, that's how much I don't want to cycle in anymore 90deg heat