I was just wondering on your source for this, because during the E-LSA class I took this past weekend it was mentioned that any fuse or circuit breaker needed to be accessible by the PIC in flight...

The guy teaching was not from the FAA, but he is a A&P w/IA. We were talking of the merits of circuit breakers and fuses. His words were you can even use the cheesey inline spade fuses from the auto parts store, as long as you can reach them in flight.