They used head nets, bug dope, long-sleeved shirts, candles... and were still surrounded by clouds of mosquitoes, sometimes so bad that they were inhaling them into their mouths.
We know what that's like, and it's not fun. But every region and every year is different. One year we discovered that if we went up another 1000 feet in elevation, the skeeters disappeared, and so we changed our route to higher ground.
How bad are they? We'll let you know, as we are about to head up into Tuolumne Meadows for a few days and will be able to give you a full report.
If the skeeters don't get us first!