I too vote for use of Pickit2 for incircuit programming via ICSP on a 6-pin header. I always put a 6-pin header onto every prototype PCB I make for programming and debugging while using Pickit2. And I have to say if you can still buy a Pickit2, buy it rather than a Pickit3....Pickit3 has had many, many problems reported in its use. Pickit2 was time proven.
John