I drop an hour is a very low rate.
Check the stick at every fuel up or bathroom break.
At that rate, I doubt you will see much difference on the first stop.
Look at and add if needed and notice at what rate the loss is, like at what point is it 1/4 of a quart low. Once you figure out the rate by driving it and checking it, make note of how many miles or tanks of gas you took. Then watch that it does not increase. If it starts to increase, you will have to stop and check more often and top off more often. But at one drop an hour, I do not think you will have a big problem.

At 100 MPH, you only need to add five drops of oil.

None if you maintain safe oil level.