When you say brand are you talking manufacturer? This is a tough one. When shopping for a new RV I look nationwide for the best deal I can get. Then start pitting dealers against one another and usually, eventually one closer to home concedes to a good price. However, this can be a bit of a headache when it comes to warranty and service if it's not real close. For starters - no dealer will even touch warranty work on a brand they don't sell - period. If you have a local dealer that sells the same brand they may do warranty work even if you bought it elsewhere but it's not a guarantee and you will not get preferential treatment. Some will refuse to work on it. Warranty work while travelling is a bit of an exception. Sometimes you can call the manufacturer directly and tell them your situation and they can help you schedule with a local dealer - depends on the manufacturer.
So, in short - yes it's definitely a risk. And you will definitely have warranty items on anything you buy - doesn't matter how much you spend.
I bought my current RV from a dealer 2 hours away. There is a local dealer that sells my brand but they didn't have what I wanted. I tried to get warranty service there once and they snubbed me. The dealer I bought from is awesome and I get very quick preferential treatment. But I have to drive 2 hours for it. And usually it has to be dropped off, so 2 hrs there, 2 hrs home, rinse and repeat when I pick it up. We make the best of it by doing an overnight at a state park we love near the dealer.
I look at it this way, I invest a few hrs of my time to get warranty work and things are usually done in a few days. If I used my local dealer where I didn't buy I go to the back of the line (if they'll do the work at all) and it could be weeks or even months. So I drive a bit for awesome service and a great deal when I buy and I think that's worth it.
Jeff - 2023 FR Sunseeker 2400B MBS