[ubertakter]

Take a cue from what my friends and I do: we generally agree to do whatever in general terms, say, visit a place Saturday after lunch. That's it. We might coordinate on a start time, but after that, it's whatever we feel like, no set schedule. We occasionally do this for longer trips, where we rent a cabin somewhere for a few days and then just do whatever we feel like. There's some planning involved in order to get to the correct area with the correct equipment (whatever is needed for the activity), but there's no strict timeline.

By the way, my wife is a "planner", so this drivers her crazy, not that she is going with us anyway. So a conversation might be like this: Wife:"What time are you going to the brewery?" Me:"Eh, after lunch" Wife:"So what time?" Me:"Maybe 1300?" Wife:"After that?" Me:"We'll get dinner somewhere" Wife:"Where? When?" Me:"Somewhere, whenever we get hungry. We'll decide on-the-fly." Wife:"Arrrggghhh!!" I have to confess I get a lot of amusement out of her reactions.