Went with the Nevada plan through Vanguard as well, since there is no real advantage to go with the NJ plan.
Have 1 daughter in VT and a second daughter going into Towson. First I would recommend saving as much as you can in the 529, you can always use one child's account to pay for the other so there should be little chance of over saving.
Use online resources or Naviance to find out where your child is on the acceptance continuum based on grades and SAT/ACT scores then apply to colleges in tiers, with the tier being schools that your child is well qualified, even over qualified for and acceptance is almost guaranteed, next apply to a few schools that are about right for your child's grades and scores and lastly, if you want apply for a couple of reaches. You may get more grant $ from schools that you are well qualified for.
Private schools can cost more in general but typically award more grant money, especially if your student is well qualified so apply for both private and state schools.
Encourage your child take both the SAT and ACT, they may do better in one than the other and there are tools to cross reference the scores.
We found many out of state schools that were comparable to in state schools once you figured in the grant $$.
Good luck and feel free to ask questions.