Well none of the alternatives listed interest me....
Understandably, professionals look at the seasonal liquidity issues a little differently. Since we don't have 2nd jobs to worry about, we can make adjustments that might not be possible for the average retail participant.
Summer is primarily for vacation, so most senior staff take off in August, leaving "less senior" people to monitor positions. I know because I was one of those "less senior" people.
Those of us who drew the short straw, often had to make adjustments to our sleep, meal and exercise schedules starting about mid June. At least in my office we had a person coming in for the the open of the Asian markets, one more for Europe and a couple to handle the pre-market and RTH of the Spoos.
I have no idea why retail traders would put themselves at risk in dull markets, but hey its certainly your choice. Personally I don't care to be in a position and watch it tick up and down for several hours at a time.....Particularly when there are some decent alternatives.
Good luck