I think some of you guys are missing my point a little bit. Terp you're saying the same thing just in a different way. You don't really care if you get accepted to Duke so you're not going to visit. As far as HBS and Wharton I still think a visit is waranted unless you already have plenty connection to alumns, students, etc. At both Wharton and HBS not only was I able to visit the campus, meet students and teachers, but I was able to interact with members of the Real estate club, military club, and their resepective minority clubs. At Wharton they pretty much tell you that the students will be reviewing you application first. I met several students who will be reviewing applications and introduced my self. Since then I have kept in contact with these people and had several offers to review my essays and offer advice in general. At HBS I got to meet the students who will be officers of the AASU next year. They were very helpful and after meeting willing to go out of there way to help you.
Building a relationship with current students and adcom members is very valuable. You can essentially go into the selection process with advocates already on your side. The acceptance rate at these schools are in the low teens. There are more qualified candidates than there are positions. If you think this is coming down to just skill your mistaken. All things being equal the guy with good contact and rapport with students and adcom members is going to get the nod over the other guy. Now of course all things aren't equal which is why one guy with a 750 and WE at McK gets accepted without a visit and the guy with a 720 and plain WE gets dinged with a visit.
At NYU the Director of admission is also an improv comedian, I've taken subway rides with him and discussed the pro and cons of NYU and I'm not from NY. He's told me what they are looking for. Why do I think NYU is a good fit for me? Because I've been there and interact with the people and know first hand. That's a little better than saying I read you website and I think I might fit in. You don't think this won't be valueable in your essays or interview. There are two main adcoms. Ones from Boston and we talked about a possible match-up between Boston and my local team. The other one is really cool gal. She will basically tell you to be a borderline stalker. She wants to know what's going on with your status. When they review my app they will be able to put a face to the name. "Oh yeah, he's the military guy, who went into blah blah blah." They are looking for people who can show that they are dedicated to their program.
So if you already have WE at a top firm a 700+ Gmat and a 3.7 from a top undergrad then yes you can probably skip out on few visits. But for the rest of us we really have to develop our ground game.
My trip to Wharton and HBS.
$250 ticket to Philly and flying home from Boston
$140 train ticket to Boston
$300 for hotel$690 and two days of vacation
That's a grand total of $345 per school.
My trip to NYU and Columbia
$240 ticket to NY (Jet Blue)
$300 for hotel (Stay at the Carter. It's a dump but my room was clean and it in Times Square)
$100 for cab rides to and from airport (I rode the subway the rest of the time)$640 and two days vacation
Only $320 per school. But to be honest I spent a lot more money on food than I would have if I didn't go so I should probably add another $50 to that.
I will definitely fit in a trip to USC and probably UCLA while I'm there and then do another trip for Stanford and Hass. Maybe UT Austin but it's low on my list. To offset the cost and the use of vacation time I haven't taken any real vacations this year. I've never been to Philly or Boston so I guess I could actaully consider it a vacation. Me and another friend who is applying wen't together and reduced the hotel cost. Then later had a blast at the Boston bars. Man do the Irish take their dancing serious

I've tried to plan the two Cali trips(due to work I can't make it just one) and they're looking like they're going to cost me a little more because the cheapest airfare I can find is $300. But all in all I plan to complete all of them for just under $3000. I also have to attend conferences with the program I'm in so I've had to pay for just airfare to get to those but it's allowed me to visit Emory, Duke and UNC and Carlson. And while I'm not really looking at those schools adcom members from all top 20 schools have been present so it's been very beneficail. So my grand total bschool extravaganza will be about $4000. A good investment I think if it helped me to get into just one of the schools I'm looking at. And even if I didn't I had a blast doing it!