I just bought a Spider sling back pack for all my bank fishing.  I really wanted a bag with a rod holder but this price was too to pass up.  Have any of you found any good ways to attach rod holders or anything like that so I can carry more rods when bank fishing?  Thanks!

I'm sure some Velcro could fashion a nice one

Can you sew? Go to a Joanne's Fabrics or alike and copy the rod holders on the full size SpiderWire backpack. You'll need some webbing and a couple of plastic clips.

go buy a rod quiver from TW, I love mine.

Go return the spider bag  (i had one and they just don't cut it) and go to Dicks and buy the Abu Garcia Veritas Sling bag that has a 3 velcro straps and a bottom butt holder on one side where you can store one or two rods comfortably.  I have hiked mountains with this thing and a rod attached to it. I have one and i don't know what i would do without it.  On the other side of the bag is a drink pouch that can fit a 2 liter bottle of soda.  its $49.99 but worth every penny.