I would say one strategy is getting into the earliest 90 hour wave. Say Wave G or H starting at 5:30 pm and then ride with a group very business-like to Villaines. I think the 90H waves go every 15 minutes until close to 10 pm? You'll be ahead of the mass,just avoid faffing around until Villaine, which is a great place to have a quick sit down food. A recumbent lets me see everything coming at you, so, I could see where the bulge of riders were in 2019 as I was returning. I slept in Fougeres, Loudeac, and a long sleep in Brest leaving a sunrise (just before 7 am) on Tuesday. Based on where the bulge was, I would guess a 35-36 hour ride out to Brest in a 5:30 pm start would put you 5-7 hours ahead of it. Things spread out even more on the return and sadly, riders drop out. So, the crowds will thin even more.