A MRE last word. Worth the read.
Few drivers can be as competitive anywhere else as they are on their home track. Their cars are set up to the optimum for power, grip, gearing, and handling, for what they race with every week. It is hard for any visitor to beat the local "aces" around their home circuit. A few do manage it, but they are in the minority.
How do these "local experts" get on when they visit other tracks ? The same applies as above - very hard to beat the locals wherever you visit. Also as above, a few can manage it sometimes, but you could never find a driver who can win everywhere.
So what are the benefits of visiting other tracks or entering meetings at places you are not familiar with ? First, you learn about the power and therefore your controller settings. Then you quickly find out about the grip level and take a sneaky peep at what tyres the locals are using. Then it is down to your own car setup and getting it to perform how you like it. Many racers will have a choice of cars to use - one that may not be the fastest around your home track will often work very well somewhere else, and be the base level for the track you are visiting. But even with just one car, the real skill comes with adapting it for racing. You will see the more serious guys with the car in bits at their pit boxes - they may be changing the gear ratio, ride height, guide height, weight, tyres, anything that could make a difference.
But its not just the car is it ? The driver is the one in control and this is where experience counts for a lot. Changing from a wooden track to a plastic track and vice-versa needs a different driving style and car setup. You may be an expert around a rally track, but how would you cope with SlotStox or a big raceway circuit ? The difference can be immense, and if you find out you don't do very well you are not likely to try it again. After all, there are plenty of tracks that you are more familiar with, so no need to embarrass yourself any more.
Having said that, visiting different tracks and trying different types of racing gives you a lot of experience. It no surprise that the best drivers have a lot of this - and I don't mean the guys that are fast around your local track, I'm talking about the drivers who can get respectable results almost anywhere. How long have they been racing, do they set up their own cars, how many tracks have they raced on ? You can't buy that sort of experience, you can only learn from doing it yourself. Give it a try - if you don't like it you don't have to do it again, but I guarantee you will learn something useful.