I think splitting them up is a good idea. I split my coins in increments of 10, I have been thinking about lowering to 5, that way if I need to sell some without compromising my other coins, i just redeem the 5 coin, or better yet, have  a mixture. 1 25btc, 3 10btc, and the rest 5btc.With 10 paper wallets you risk them being destroyed. You also have the problem of not having a true hot wallet in order to send bitcoins on the fly with unless you carry the paper wallet in addition to your phone and scan in the key.