Two halves, and doing only one of them is entirely usual
The talk
An hour with slides in the hall, level access, hearing loop, and chairs. Complete in itself and worth coming for alone.
The walk
Ninety minutes after it, on rough uneven ground in the dark. A torch and boots, and it is not suitable for wheels.
Doing one
Perfectly normal. About half the room leaves after the talk and the walk usually has a dozen people.
