rather than setting up a multisig, would it be good to split my seed words into two remote locations? or is this idea flawed in some way?
You should never do this and what you should do is making multiple wallet backups and store them at different locations. Remember that each of those locations, you have a full backup for each location that means only with it you can recover your wallet completely and successfully.
How to backup a seed phrase?Why seed splitting is a very bad idea?What you intended to do is seed splitting and as you see, it's not recommended.