If your race is on a Sunday, you can try to do as much of the logistical stuff (kit pick up, register, etc..) on Friday, and then on Saturday you can do the STa *swin taper* workout during the morning swim practice, directly at the swim course. Then afterwards do the RTa *run taper* workout to wake the legs up.
After that, you can go about your day. Have some lunch, visit the village etc. And before you drop your bike off at T1, you can do the 20 min recovery spin. Or if you’re planning on riding your bike to T1, you can use the commute as the 20 min recovery spin.
At least that’s how I did it last time and I think it worked out ok.
Cheers.