I think the best answer is "Buy low, sell high" and if you can predict the dates to do that, you'll be a wealthy man.
I do think there's going to be a downturn in sales and a slump in prices as used inventory hits the market from people who decided that RV'ing isn't right for them. I thought it would happen at the end of this summer, but with Delta picking up (and new variants might be on the way), now I'm thinking it's not going to happen until next summer at the earliest.