There are plenty of those, and fanny packs, and tie around the waist, and wear them all day.  UNOFFICIAL OPTION: If you really want to get rid of them leave them with rest stop staff or in a SAG wagon.  Make sure they are labelled well and remember to go looking for them in camp, don't expect them to come looking for you. 

It is helpful, on this ride, to add some larger capacity storage on your bike. (The weather changes throughout the day can be pretty significant.  Jersey pockets just won't hold the fleece shirt I like to have in the early morning if it is really chilly.) A handlebar bag, or rack pack, can be a useful addition without adding much weight. I am aware of people utilizing the SAG vehicle but the SAG folks can't be expected take responsibility for your stuff so I like keeping it with me if possible.