I have about a 27" inseam, (don't get called "Squatty Body" for nuttin
), but I can still reach the ground, not quite flat footed but a hell of a lot closer then I was on the Triumph Scrambler! I've sat on B5s and they seem to be just a hair taller and the seat seems harder. But I wouldn't have any trouble riding it.
Maybe the seat will soften up and come down a little, but with a 30" inseam, you should have no problems.
Bare