I did that also - scheduled them in the order that I received them - and would recommend it as well! Luckily I've only run into one conflict so far. U of Washington invited me to choose one of two weekends, but I am already interviewing at other schools during both of the options given. I politely stated that I have prior commitments to interview at other places during those weekends, but would be happy to visit UW on a different date. The director of the program actually worked with me to figure out a weekend that they can fly me to Seattle and interview, but it looks like it'll be just me. I'm sure there are advantages and disadvantages of not being able to be a part of the "recruitment weekend" activities, but at least I still get to go and meet the faculty and students! I wasn't sure if the department would be receptive to my offering a different visit date, but a graduate student in my lab made a pretty good point: if they want you, they'll accommodate you!