BAK normally was a pre-solo requirement.
My experience for doing PPL out of EN was TOTAL immersion in the system. If you can operate out of class C then radio procedures carry no fear factor come the last ride with the ATO.
Ab-initio, you really need to do this at a non controlled aerodrome with an adjoining training area. Whilst it was pretty cool to depart a controlled aerodrome to do circuits at a MBZ (CTAF(R)) some twenty miles distant and then return, with all the adjoining procedures....just like a mini navex every time you go up...all this on a RPPL which is more than a GFPT...it all comes at a BIG cost. I feel you really need to weigh the costs of doing up to GFPT level at EN.