I think, if it is even functionally possible, we might end up with three coins;
1) Bitcoin as it is running right now with no significant development team to love it at first
2) Bitcoin-SW as envisioned by the "Core" development team
3) Bitcoin-BU ...
One thing I know for sure; I will continue to run my own full node (which variant I need to think about). If SW does indeed soft fork then I will need to remain vigilant and either move my non-SW-UXTO to SW-UXTO (it's too early for that, right?) or move it to the -BU coin (how is that done or am I confused?). I don't want to lose my investment. All this debating/fighting is undermining my confidence. Maybe I should punt it all over to ETH (although I may have missed the majority of the run up already but at least maybe I could hold value there). Otherwise maybe I should just take my profits back to the fiat world (yuk).
In the case of a bilateral split:
Make a copy of the blockchain/wallet directory
Install both Bitcoin Core and Bitcoin Unlimited (Might need to make a Program Files directory copy, or change the name of the binaries if they conflict)
Change the ports in one of the blockchain directories in bitcoin.conf to prevent conflict.
Now you can run both Bitcoin Core and Bitcoin Unlimited using the -datadir option. You are automatically hedged at this point by doing nothing.
You do not need to move Bitcoin Core UTXO's to SW-UTXO's unless there is an announcement to retire native UTXO's by Bitcoin Core.