DF and I are indecisive. Here's my tuppence
When planning the trip in advance send some options and follow up to ask them what they like the look of
Keep it flexible e.g. a booked day, then a non planned day. Make sure anything is cancellable if there is illness.
Plan the next day the night before - don't try and plan it in the morning.
Don't ask what would you like to do - you could ask how much energy do you have, do you feel like walking far etc.
Give no more than 3 options, do express a preference for one of them (what's exciting about it), but tell them it's their holiday too.
You are showing them where you live so be proud to show them. Show them simple things you enjoy, rather than big special days (though nice to have those)
In terms of food and drink, let them know what you've got at the start, if they say they don't mind then just say try this. If they seem to like things stick with those. Bring in something new now and then 😂
If they say 'it's a shame we...' or 'we could have...' use that feedback next time go back to that place and do what they expressed interest in doing.
None of this may help but I've been visiting DF for a few years and we've learned these things.