I agree it is extremely difficult. It took me until my 12th city to find a reactor city. It was over 15000 blocks away from my base. I found more graveyards that were easier than the cities to raid. But not under the graveyard. I have yet to invade the crypt under the graveyard....I am just a "graverobber"
Eventually I will do the crypts. I am still getting the nerve to "undig" the cities. I have completed the quest book. Now to play...but now that Shane has said he is updating, I am waiting until the update. Shane is there a link to a video about the update? I wasn't able to be there for the twitch update on what you are updating. Oh....and in playing both 1.12 and 1.13 I find that my "skin" shows about all the time in 1.12, but not in 1.13 at all. I have tried different launchers (curse and ftb) restarting new worlds with fresh files and still the same. It is in SSP. Not sure if this happens in multiplayer.
Anyways, I am anxious for the update, but I am willing to wait. Crash Landing is my favorite pack.