IFR IN A SINGLE
You do try to work out the winds on the ground, there are various rules of thumb to point you in the right direction depending on the angle and strength of wind off track. Then you add or subtract some time off your one minute legs based on the wind strength again. In a strong wind, a hold usually ends up kind of egg shaped, but as long as the inbound leg to the beacon (VOR or NDB) is on track you're fine. But, a wind change at the destination can lead to some frantic mental arithmetic in the cockpit. I assure you!! Hopefully I always get vectors to an ILS!!