On any tank bigger than a ten gallon the safest route to go is ALWAYS empty the tank 100%
before transporting it. More important than removing the plants would be to get all the substrate out. Substrate can add a lot of weight to the tank, as well as sloshing around and scratching up the glass.
Yes, some people cheat; yes, some people get away with it. But do you want to be the one left w/ a broken tank? Or worse yet, one that ends up springing a leak when you're not at home to save your stuff? When making a decision like this I try to do a quick risk/loss assessment. Ask yourself, if I break the rules and loose, what's the worse that can happen? How great an impact could this create? Will I be able to comfortably cope with the worse case scenario? (Or how mad and unhappy will I be?)
If it's going to be set up in a dedicated fish room: cement floors and central floor drain - go ahead and take the chance!
A lot does depend on how far your moving. If just in town, I'd just pull the plants, toss them in some buckets w/ water from the tank. Then when you're ready to head out the door put them in plastic bags, no newspaper or water needed.