I use the trip meter like everyone else. You can use the bike for touring. This past summer I rode from MI to NJ, which is about 800 miles each way. I like to fill up every 100 miles, especially in unfamiliar areas, and I'm ready to stretch my legs anyway. Be careful about using secondary rodes late at night, when touring, as all the gas stations may be closed. I went 130 miles in PA before finding an open station.
You have to manually turn it to reserve, but you don't have to stop. Practice, just sit on your bike with your left foot on the peg, and get a feel for where it's at. Then when riding, and the bike starts to sputter, just reach down & turn it, and don't try looking for it when riding, just feel for it.
After you fill up don't forget to turn it back to the "On" position. If you run out of gas on "Res", you're done, turning it to "On" at that point, isn't gonna help.
If everything is under control, you're going to slow.