I have done RtR a couple times. The weather can be so changeable! You definitely need to be prepared. Hot and dry, cold and snow. Hail, rain, wind, forest fires! At one time or another, we experienced all of those! I carried with me (or sometimes started out in the morning wearing) wind/rain shell jacket, arm warmers, leg warmers, toe covers, finger gloves, earband, and I think that about covers it....... I never wore all that all day. Sometimes, it would come off then go back on, as when headed down a pass. I managed to carry it all in an expandable seatpost bag and a fanny pack. The fanny pack was fairly large and extremely stuffed when full. Once riding, I really didn't notice it, tho' it sounds uncomfortable. This was back when I was more of a minimalist as to what I carried on the bike. Nowadays, I'd be more apt to throw a rack on back with a trunk bag and not worry about the extra weight. Much easier and more comfortable. However you work it out, you will have a wonderful time! It is a great ride.
annie
Time is a companion that goes with us on a journey. It reminds us to cherish each moment, because it will never come again. What we leave behind is not as important as how we have lived." Captain Jean Luc Picard