Whether or not you "make too much for financial aid" (I assume you mean need-based aid here as opposed to merit aid) depends on many factors, most importantly the specific school you are inquiring about and also your family's financial situation beyond the incomes of the parents.
Beyond that, if you are worried that putting money in a 529 will mess up financial aid for your child, the first thing I would ask is: what else would you do with the money if it isn't put in a 529? Some options will probably provide more need-based financial aid, some options will probably provide less need-based financial aid, and some options won't make any difference.