Any question answered...

Time for a really, really silly question from myself, google couldn't humour me.

I use a full suspension bike for some rugged bikepacking applications. The three areas of concern for me are primarily:

1. Front fork seals (not so much stanchion seals, but air pressure seals) - the risk of these failing can be reduced through routine maintenance before a long trip
   
2. Rear triangle bushings - routine maintenance, potentially swap to needle bearings?
   
3. Rear shock seals - this one is a bit more concerning, I feel a collapsed rear shock is worse than a collapsed fork.
   
   

Has anyone actually machined an "emergency" solid piece of metal, hard polymer or something that can be put in place of the rear shock to turn the bike into an "emergency hardtail"? I guess the weight penalty for something like this is pretty significant, as you would need tools to replace it with the collapsed shock as well as the actual piece itself.

What does everyone else do to minimise the risks of air shock/fork failure on remote trips? Is it truly a case of "use a hardtail and coil fork"??