Anonymous wrote:OP here. Thanks for the thoughts folks. We are in VA.
Also wondering if there's a website or info. somwhere that shows the change in prepaid fees over the years so I can determine how much I may have to pay if I delay participation..
There is a good deal of info on va529.com, but you have to search around. You can find the prepaid cost schedules for the past few years, as well as the "reasonable rate of return" for the prepaid (the amount they payout in addition to principal if you attend out of state - the lesser of average instate tuition OR reasonable rate of returns).
I think your approach is reasonable as far as trying to hedge the market and the tuition increases. If you are going to do invest, you don't have much of a time line for the 12 year old, as you only have a few years to be aggressive. Prepaid may be a better option there. Or you can move the invest money from the older kids portfolio to the younger if it is under performing when you need it.
I would not worry about using any other states options, va is pretty decent as far as options (some vanguard funds, some balanced funds) and their administration fees went down for 2014. Plus their deduction (per cpntract) is very generous.