May I suggest another poll?
How long did it take you to decide on your camper trailer? from the moment you thought that a camper trailer might be for you till the time you actually purchased one.
For us that time was three years. We were tent campers when we thought that maybe moving into a trailer might be the right move for us, so we started taking interest what was happening in the trailer market, reading forums, buying the magazines, attending the shows and talking to people who had them. Nothing over the top at first, it was probably 12 months before we bought our camper that we started looking more seriously (and having the cash to do it)
I mention the time frame because by the time we started looking seriously, we had already stopped buying the mags and discounted their opinion. As a few others have stated, after a certain time period it becomes apparent that it was the advertising dollar driving the comparisons and not necessarily the camper itself. I remember one comparo where if you had been reading the mag long enough to know the style and learn to read between the lines you could tell they thought the camper was crap, yet nothing really negative was said about it other than the camper still has some room for improvement. After reading far to many articles that shied away from stating anything negative about a product I lost faith in the mags ability to give a fair and honest opinion on any product.
Then there was the issue that after a while I was noticing that many of the articles were recycled ideas from 6/12 months ago or already covered by another mag.
So for us personally we would not have looked at your camper based on what was in one of the mags, but it would put your name out there and made us aware of your presence in the market.
I would think though that depending on who your customer base is, is dependent on how effective advertising in the mags will be for you.