Just for a frame of reference: I ride mostly off-road although I do like to hit the road every so often to get in some spinning and bigger mileage.
1. Bar ends: If you're needing to move your hands while riding on the road, bar ends aren't going to help you. They're for mt. bikes. But in that regard, I couldn't ride without mine on the trails--they come in particularly handy when I'm climibing hills. What about aero bars for your road bike?
2. I use a mini-pump and keep it in my camelbak pack.
3. Can't help you on the Yakima questions. I ride non-WSD frames and they fit fine on my Swagman hitch rack and Thule roof rack. Hope you're able to find a good answer to your question though.
*~*Lori*~*
1998 Schwinn Homegrown Factory FS Mt. Bike
2000 Trek 2300 OCLV Road Bike