At those speeds you should absolutely disconnect the driveshaft. My favorite way of doing this to avoid losing any fluid is to take it loose at the rear end. Wrap around the U-joint caps with some wide masking tape to keep them from falling off. Then use thick gauge mechanic's wire to loop between the U-joint and shaft and pull the shaft up and forward as far as possible then tie it off on a bed cross support, so that it can't slide out, and keeps it away from the pinion yoke. Throw the U-joint straps and bolts in the glove box so they're not back there clanking around, and go for it.
This way you don't have to have a collection of yokes on hand, don't have to worry about the inevitable puddles of fluid you're going to make when you remove the shafts, and no worries about possibly damaging the surface on the driveshaft's yoke when you toss it into the bed of the truck.
You getting ready to bring me a few trucks? ;) ;)