Welp, I've come to this page late in the discussion, but I think I've seen enough on this page alone to comment. For several years I used to drive cross country tours for Cosmos/Globus International. I'd pick groups in New York City and the tour would end up at the Santa Monica pier 23 days later. Only drivers who get requested do these trips, because they are a SONOFABITCH to do and it takes good dedicated drivers to do them. Both the driver and the tour director rely on a "final tip out" in Los Angeles for their compensation. Those from the Australia and the UK have to be groomed to tip, because it's not something they normally do in their cultures. These are the places I'd take them to see.:
Pick up in New York City
Philadelphia- Liberty square (Constitution Hall, Liberty Bell)
Washington DC - Tour of Memorials, and other sites.
Niagra Falls, Ontario (overnight)
Detroit, MI - Ford Museum (overnight)
Chicago, IL -City Tour, Dinner Trips, etc... (3 nights)
Minneapolis, MN - City Tour, Mall of America, Paddle Wheel Dinner Cruise in St Paul. (2 nights
Pierre, SD - mostly a travel day. Corn Palace in Mitchell, SD (overnight)
Custer, SD - enroute, Badlands National Park, Wall Drug, and Mt. Rushmore in the Black Hills. (overnight)
Yellowstone National Park- The Grand Tour, Niagra of the Yellowstone, Fishing Bridge, Paint Pots, Old Faithful, and more. (2 days)
Grand Tetons National Park
Salt Lake City, UT - Tour of Temple Square, Dinner at Brigham Youngs House next door. (overnight)
Bryce Canyon National Park
Zion National Park
North Rim of the Grand Canyon, stay over night in Cabins there.
Las Vegas, NV- stay at the Imperial Palace Hotel Casino (across from Caesers). City Tour and three days there.
Calico Ghost Town
Los Angeles Metro- Symbolic end of tour is at the Santa Monica Bridge, although a City Tour with dinner happens and Universal Studios.
Keep in mind, I am driving a 45 foot tour bus in the tightest places you can imagine, especially in the North East, where local police could give shyte about your schedule or the lack of parking. Idling a bus as you offload and load, mostly middle aged and senior citizens, could net you a $500 fine in a heart beat. Since there is no parking, bus drivers are forced to drive around the city while their people are seeing a site or eating. You must find time to get fuel and clean the bus, daily. That chemical toilet must be dealt with and you can't just dump it in the street.
It takes planning throughout a 23 day trip as to where you can do these things, especially when you tour the National Parks, they want a squeeky clean window to see the natural beauty and wildlife, and there are no bus washes, so you get to wash the outside of the bus after driving 500 miles at times. Driving is the fun part of the job for me because I had the greatest view of the country while working.
I mentioned the above to outline the amount of customer service involved and the resulting expectation of a nice tip at the end of the trip. Normally 40 people are on the tour and an average tip per person was about $50-$75 a person for cheap tippers. If I got $2500 - $3000 in tips, that was about normal. I also was paid my normal wage with a per diem, and so it was about the best paying work at my Kansas based charter company, but I wasn't home but maybe 2-5 days in the span of 5 months when doing these tours. The few days off were when I was passing through Kansas, driving an empty bus from LA to New York for the next tour. I did this year after year, until my wife worried about me and my health, and so I quit in 2009 to go to University and be home. As in other service oriented professions, the market wouldn't bear paying me a" living wage." Most days I worked 12-15 hours a day, except 2 days in Vegas, where it was just more relaxed in getting the bus cleaned and fueled.