Just a few thoughts.....
I was warned that the first place we took ours to....they'd fall in love with....so choose that 'one' wisely. While that didn't exactly play out for us, one of the earliest in the search still holds the #1 slot. And that was one DC really didn't have on their radar (but, gosh, we insisted!).
Don't try to "do" more than one a day.
Will the entire family be going and are there younger siblings tagging along? If so, please make it more about the 'trip' and the vacation than (necessarily) about the college visit.
Please don't take them a place you just can't afford. Out-of-state public anything gets expensive quick! and while some still offer merit aid, the grades and test scores HAVE to be there. Do NOT
depend on getting any sort of financial aid to make it 'affordable'.
If possible, sign up for and take any organized 'tours'. Many schools are just starting to post their Spring Semester tour schedules and the ones during K-12 Spring Break fill up fast. If not part of the tour, definitely eat in a campus cafeteria (and not just one of their 'cafes'). Come up with just one 'stock' question and ask it everywhere. Semi-unusual ones (like: 'what's the longest it takes you to get to class?', 'have you learned the alma-mater/fight song yet?' or 'what's the one thing you wish you'd brought from home') usually get answered and often kick-start a broader conversation.
Another big "if" -- if your DC knows what kind of program/degree they're seeking and can arrange for a personal meet-n-greet with that department, those are invaluable.
Depending on the age/situation of your DC, have them drive part of the way. There's a big difference between an experienced driver doing 4+ hours vs a 'young' driver. They need to know/learn the feel for just how far away is....going away.
Have fun and, please, come back and tell us how it went.
