steelhead, BigD, excellent posts. I just did an 810 mile day last weekend. Just to add some other things to help you make it through the long rides. This isn't totally off topic here since point #3 is about hydration
Modifications to my Busa: 1 1/4" bar risers to relieve back strain, TL1000 pegs for more leg room, AudioVox Cruise Control so I can rest the throttle hand, ZG double bubble screen for better wind protection, +1 front sprocket for reduced vibration.
If you are planning on running long distances, here are a few tips:
1. You should work your way up to it. There are ways to build up your endurance, but it requires lots of riding. Seat time is the best way to increase your riding distances. I know, I know, it's a sacrifice
2. Earplugs! I can't stress earplugs enough. The constant wind noise, and engine noise will wear you down. Not to mention the damage to your hearing.
3. Hydration is VERY important. Make sure you are hydrated before leaving, otherwise anything you do on the road is just playing catch-up. If you can stand wearing a small backpack while riding, I'd suggest getting a Camelbak, and learn how to drink from it on the move. It's not too hard to get the bite valve up between the chinbar of the helmet and your chin. Getting dehydrated will seriously tire you out, and you'll be taking alot of extra time at gas stops if your trying to rehydrate standing still. I drink about a liter of water per tank of gas. Slamming a Redbull at each gas stop won't keep you hydrated on a long ride.
4. Compression shorts (aka bikecycle shorts under your leathers) believe it or not these can reduce saddlesore a great deal.
5. Do not rely on pills and caffine to get you through. A regiment of aspirin or Ibuprofin can mask the damage your doing to yourself.
6. Meals should not be huge, but modest in size. So no double quarter pounders and fries for lunch. Too much food will cause what some of us call 'food coma' not a good thing to go into while trying to ride. But don't try to exist on Powerbars and Gatorade. Eat sensibly.
7. Something as simple as a Throttle rocker (less than $20), can help exend your range. A cruise control of some type is better, but they're more expensive and depending on what you get can take some adjusting to get right.
Hope this helps.