An issue discussed amongst aircrews who had SIOP missions was what to do if one survived the bomb run. For many crews returning to the USA, or bases in the UK meant be able to tank up on the way home - which might very well not happen as some tankers would be shot down, run out of fuel to transfer, or never get off the ground. Other crews, primarily those flying tactical aircraft especially those from aircraft carriers, would not have enough fuel to even exit the borders of the USSR/WP (this was true for some B-47 missions as well) and these folks were on one-way missions. Of course even if you had enough fuel your home base, and potentially any diverts you could land at, might be smoking holes in the ground or your carrier might have gone down. The best option would be to land at a US or NATO field of any sort or even bail out over the US or NATO if there was not a field available. After that a neutral country, preferably one that was "friendly". The worst option was to fly towards a NATO or neutral and bail out as close as possible and hope to be able to walk out. Whether because you were shot down or had to jump because you ran out of fuel, trying to escape and evade through a country where you had just dropped nuclear weapons was not a good thing. Aside from trying to avoid radiation exposure, the local population is not going to be very happy with you - if you are caught by the military you might survive, even if unpleasantly, but if civilians caught you it would not end well.
More than one crew discussed simply going up with their combat load when the last bomb went. By the 1970s it was obvious that there would not be much to come back to, unless there had been a slow build up to war their families would be gone and of course the mess that used to be the USA...