Yup just drop them in.
Nobody mentioned this before, but I clean my forks using spray carb cleaner. I'll wad up a shop towel, stick it the top of the fork tube, and cram it down in there with a looooong 3/8ths extension, or whatever you have that'll fit in the tube. Then squirt carb cleaner in there and work the shop towel up and down through the tube. Once you pull the shop towel out, it'll be black, and the inside of the fork tube will be shiny and smooth. Be careful not to mar up the inside of the fork tube when you do this.
I do this with the lowers too, but since I usually wet sand them before reassembly, it's a little unnecessary since they'll be submerged in water while you sand.