In my experience, incall is just someone else's hotel room. It works better for locals that can't use their own house / apartment. If you already have a room at a nice hotel, then outcall would work. Hope things go well for you.

If I'm on the road for a business trip I try to do outcall appointments. But when I'm home I much prefer going to a provider's incall location.

As long as it's a well reviewed provider or agency I really wouldn't worry.