I am outcall only after a period of incalls, and seem to be doing ok. When I did offer incalls I did realise that one reason I didn't do many outcalls was that I was already busy with incalls, or clients weren't prepared to go through the providing details bit, but now I am outcall only, well there's only one option.
I use several ways of getting to bookings, if I can I use the train which I find a lot less stressful that driving.
Sometimes I drive myself, and sometimes my security buddy drives. It all depends on the booking length, length of drive and also how I'm feeling. I do know that having a driver or taking public transport does mean I arrive feeling a lot fresher mentally, than if I have driven myself.