i guess no need to add CC... just give yourself additonal energy... our bike will not surrender specially if its well maintained, our body is one thing we need to consider, if your up for the challenge...
but for my experience... as far as a want the place to go to i dont feel tired but more of excitement to achieve another ride and put it on my riding experience
LOL, but you are much younger than me paps,,,,, something that most dont take into thought doing distant rides is the fact that you have to "practice" distant riding. People think thats funny when i say it but trust me if you ride often and ride longer rides, when you go to do an extreme ride you can handle it much better than if you are always doing little short rides,,,,, your body will tell you the difference trust me!! When doing long rides i make sure i use spandex type bike shorts to keep the family jewels in the right places which make a big difference as well and there are many other tricks to riding distance more comfortable/safer.