Fork geometry's fairly simple really, take a line through the steering head bearings and extend it to the ground, that's the steering axis. The.further behind the axis the tyre touches down ("trail"), the.slower the steering will be.(increased caster effect), a few inches is in the right area, more trail adds some straight line stability too.
The amount of fork rake matters a lot, the more rake.the more it'll tend to fall into turns and be a bit of a handful, the.long wheelbase ain't going to help, either!
I suspect it'll be.fine.;n straight lines, pants on bends - like most choppers :-D