Jan, Welcome! Glad you joined us..............
As Carol was saying, most molded
fiberglass won't be found a rv show's. As far as the pulication, I suppose they will both help you, but would also say that you can find a ton of information on the world wide web. It's been so many years since I actually even looked at any rv consumer guides I can't help you with if those would be beneficial to you or not.
You don't say what type of trailer your looking for? A few important things to finding what the perfect trailer would be is, What's your tow capacity? How many people are you looking to sleep in the trailer? Do you want a bathroom option or not? The first question is the most important, then from there you should be able to find what will work best for your camping needs.
Again, Welcome!