It is difficult to decide how dependent it is smart to be on complex technology. On the other hand, the more access to and use of technology you have, the better your chances of surviving would be my guess.
Anything electronic can break. With schematics, replacement parts, diagnostic tools (which can fail too) and training and practice, you could fix most problems. There are a lot of co-dependencies in that process which means it is more risky to rely on. Things needing batteries would be a weakness. You could have a solar powered VOM. An oscilloscope would be a nice thing to have if you have to maintain electronics.
Even the simple things wear out and break. Spades get worn to a nub if used enough, ax heads can split, shoes wear out, clothing disintegrates. Once the high tech clothing is gone, without a loom and wool or cotton, I think you are down to skins and leather. Same for shoes. You need to shear, comb and spin wool before making clothing. It is easy to overlook how much older basic technology is needed to supply the simple things that may get taken for granted.
There should be a good supply of scrap metal laying around for the taking. With a forge, hammers and anvil of some kind, tools can be made or repaired. Not sure about fuel for the forge, some coal would be nice I think.