Stock/bond choice for long term 529 plan (grandchildren)

[Snowman9000]

We have ~$4,000 left in a 529 plan which can be held for grandchildren.  In our case, theoretical grandchildren.   So we don't expect the money to be needed for more than 20 years.  There is no way to do gold.  The choices are your typical mixes of stocks and bonds.  All the way from 100% of one to 100% of the other.

So, I could pick one today and try to let it ride.  Or, I could try to market time.  My tendency is the latter, because I have had some success being a value investor using broad based funds or indexes. 

But, what would you pick as a one-decision AA?

[MediumTex]

How about PRPFX?

[Snowman9000]

No, that's not in the plan.  I doubt if it is in any 529 plans.

[MediumTex]

I would just do 50/50 stocks/bonds and perhaps rebalance annually.

[Snowman9000]

Well, it's unanimous then! 
50-50 was my favorite as well.