You are on duty for 5 days, if you're on the road or flying all that time is up to how busy the company is. You have a pretty good idea of where you are going by the day before. However, keep in mind this is charter and things can change fast.
The day before we are told our schedule for the up coming day. Therefore we already know pretty well where we will sit and for about how long. They are pretty good at scheduling the day so that you don't sit too long most times. Otherwise if they don't have anything else for you, they usually will tell you to fly home or go to a hotel.
I start each day with a pretty good idea of where I will end up, but again this is charter.
Hampton Inn, Hilton, Marriott, Crown Plaza, all very nice places. So far speaking for myself I've ended up in at least a Hampton Inn near the airport. Even the small ones. If there is nothing nice they will deadhead you to somewhere else.
I would say at this point close to half of the flying is alone, just heading out to pick up or repo for the next trip.
A lot is done to backwoods airports with only a GPS, however we do our fair share of class B airports as well.
With pax we don't fly VFR, only IFR.
Its hard to say how much sitting we all do in a day. I have heard of some flying a lot, and myself not so much. It depends where you are based, and what days off you have. Seems like I have our busy days off so I'll be home for sometimes a week to a week and a half at a time. When I'm on a trip, I don't sit too much in a FBO, they schedule a min of 30 mins for turn around.
FBO's seem to treat us well. Depends on the person behind the desk. I get a lot of complements from the ladies for my uniform.
But, yes, for the places that have crew cars they let us use them. Most places have them, some I would dream of touching. If you do have enough time and there is nothing near by with no crew car, Ops will rent a car so you can eat.
Pack a lunch, vending machine, fast food when near. If you're busy and stopping in GMU sometimes they will buy you lunch and deliver it to the airport for you.
Hope this helps.