I live in Charlotte. If you did not want to worry about parking downtown and hotels in town are a little on the expensive side. You might want to look at Matthews, NC. That is a little small town outside of Charlotte and within easy driving distance to the 485 train station. The price I think is $3 for a round trip ticket. Or like $6 for an all day travel pass. That will take you about 15 minute to get downtown with a few stops. And it takes you right to the convention, Westin Hotel, and Nascar hall of Fame.
If you want to Mapquest how far a hotel is from the train station, there is a movie theater across the street and this is the address:
9541 South Blvd, Charlotte, NC 28273
You can try to use that. That is the best I can do to help someone figure out how far something is from the train station. It is also free parking at the train station.
But for people going downtown, a must hit is the Epicenter. Right by the Time Warner Cable arena. Right where the Bobcats play. There are some fun bars and good restaurants right there. Dale Jr, has a bar called Whiskey River. There is a bowling alley, and some very nice restaurants in verying prices from Mortimers that has its menu at like $8 for sandwhiches, but not sure what they charge for drinks. Blackfin is a higher end restaurant. there is a good pizza joint and cannot remember the name. There is Strike City that has 12 bowling lanes, 3 bars and good food. Lots of big screens for sports too. But those are some good places right in the Epicenter. Might be about 1 mile give or take from the convention center.