If you add とする, doesn't it mean that they actually are going to do it?
例：お父さんは銀行へ行こうとする。Father will go to the bank.

Doesn't Volitional + とする　means "try to do"

So I use volitional quite a bit to say "I'm thinking about doing X." To do this, I say ~Volitionalと思っています。 Is this correct? I don't know where I learned it, but I seem to use it a lot!

On another note, wanting to review this grammar point but not knowing where it was located, I used the grammar search box on the main grammar page. Unfortunately, typing in "Volitional" yielded nothing. This is probably a wider problem, but shouldn't the English titles in these grammar sections be search-able?

Based on my research the negative form looks like this:

Godan:
V + まい

Ichidan:
Vstem + まい

exceptions: 
する > するまい / しまい
くる > くるまい

That makes sense, thanks!