The pro-v's are excellent blades; tough, float, very soft and quiet going in and out of the water. if you spring for the dyne's, don't overlook the shoal cuts.
multi-days out of a 13'er rigged for fishing are going to be tight, tight as it is so you will be packing light anyway. dry box will be really nice when you can get one but in the meantime a cheap ass cooler, buckets with gamma lids, action packer, etc. will work fine.
another spare oar is also handy just for having a good spot to ship your oar on both sides. don't forget the long handled rubber net!