First, I like her a lot. You should talk with your instructor about the local DPE attitudes toward EFBs, but I imagine most are resigned to them.
I’ve heard that most will have you turn off “enable ownship” in the settings, so there is no position marker for you to crib. You can also fly just by the flight log to practice DR.
I always carry paper charts, but I’m old, particularly the low-level VFR charts that show the wormholes through crowded class B airspace. But i find paper charts particularly useful for chair flying and pre-planning. The Bushcat is slow and my maximum bladder and need-to-leash-up-the-prostate-and-take-it-on-a-walk range is 3hrs, which leaves about an hour in the tank.
It’s a lot easier to sit at a table with a plotter, tick off 3 hrs on the plotter under expected conditions, swing it around left and right of the course to find airports that might be good to tank up at (using ForeFlight to check prices). Also, to evaluate runway alignment to expected winds, particularly if they’re gusty or strong.
But, in flight, I use ForeFlight. Be aware, that ForeFlight is powerful, but it’s also intimidating to learn and to set-up. However, it’s also amazingly useful. The latest update even serves up radio frequencies as you might need them, depending on location and speed.