I am scratch building a HLG on paper at this time and would like to use dihedral and not poly.

The info/questions I have are one: The wing will be 56" with a taper cord on trailing edge 7" to 3.5" and cr001sm airfoil.
how little dhedral can I use without needing ailerons? This might lead to question two.

Info/question two: I plan on a V tail if it matters. How much distance should I have from leading edge of wing to leading edge of stab for directional stability and good turning habbits with the dihedral you guys suggest I use?

Thanks in advance and as always I really appreciate your sharring of knowledge.
Ace