Transfer to UNC or a filter school for UNC

Hello!! I recently posted a thread about me wanting transfer from the University of Florida to UNC chapel hill: http://talk.collegeconfidential.com/university-north-carolina-chapel-hill/2016406-transfer-to-unc.html#latest

I am currently a first semester freshman at UF.

However, I was also wanting a back up plan and although I want to go to UNC and transfer as soon as possible, and am working towards building a high GPA to make me a good candidate for Fall 2018, I want to apply to at least one other school that could set me up for junior transfer success if need be. Any thoughts on that would be super helpful.

What do you call “filter school”?
Why are you attending UF right now, is that your state flagship or are you OOS?
Are you instate for North Carolina?

@MYOS1634 I guess technically a back up school around UNC that could set me up nicely for junior transfer.
I am a Texas resident so I am out of state for both UF and UNC.