Low cost:
-dry bag with straps to handlebar to do as handlebar roll
-dry bag with straps to do as saddle bag
-get a large cheap triathlon TT bag to do as a snack top bag if you like
-two water bottles
-small backpack to take on frequent use stuff - camera, sweater, food etc
Sleeping bag, mat, tent etc in handlebar roll. If your sleeping bag is one of the huge old types might be worth looking into some sort of compression sack for it to pack it down.
Low cost:
-dry bag with straps to handlebar to do as handlebar roll
-dry bag with straps to do as saddle bag
-get a large cheap triathlon TT bag to do as a snack top bag if you like
-two water bottles
-small backpack to take on frequent use stuff - camera, sweater, food etc
Sleeping bag, mat, tent etc in handlebar roll. If your sleeping bag is one of the huge old types might be worth looking into some sort of compression sack for it to pack it down.
Clothing in seatbag.