I've never been to a naturopath. I have been to a chiropractor (with amazing results no GP was ever able to equal, or even come close). When I first considered taking a friends advice about the chiropractor (their take on it was.. you've been to doctors for years with absolutely no results; the chiro is covered by your insurance, what do you have to lose) my girlfriend at the time, who was an MD, denounced all chiropractors as quack medicine AND potentially dangerous. Being your typically stubborn male, I went anyway. Immediate results, AMAZING results. So, I became a firm believer in chiros, with the caveat that they are no different than any other profession, good ones and bad ones. So, patient beware. As for naturopaths, I have absolutely no experience, but I believe that, logic and common sense not out the window, there are very probably good ones and bad ones. As for whether they constitute real doctors, I happen to know a cardiologist (tho not well). He considers almost ALL other doctors just quacks.
If what you/yours are doing for Crohns is not working, and there is no precipitous spiral downward (like a runaway rollercoaster) then it might be worth investigating this venue.
When I started on LDN, the vast majority in the medical world considered it totally quack science. Thank God I found one who didn't. It's a shame that so many still do.