Planning and executing a wedding (or any other event) is only as stressful as you make it. My wife and I got married last October. We took a year and a half to plan the wedding/honeymoon because we didn't want the stress of trying to put it together and pay for it in less than 6 months. It ended up being a very classy, relaxed wedding/reception with family and close friends (~60 guests) that didn't have that "thrown together at the last minute" feel that so many weddings have. I've been to some real train-wreck weddings (usually young kids that had no reason getting hitched) because they tried to stuff 10 pounds of s**t in a 5 pound bag.
Same with me & Mrs. Fierro. Went off like clockwork.