you might find that you don't need to run and front brake if you don't do any tricks that you can't foot jam (foot behind forks on the tyre and jam it under the forks to flip up the back)
I thought that I would want a front brake, but after riding with out one and feeling safe if stopping hard with the grip that the back brake gives - it works for me
try the big tyre without a front brake and see how you get on