I think it will be a state by state thing, not a team by team or conference by conference thing. It will definitely lead to headaches in getting everyone synched up. I may be wrong, but if a college and/or state is still shut down, are the players permitted to practice or even be on campus?
I would imagine restrictions in the rural SEC south will be relaxed before urban schools in regions hit much harder. That said, latest projections have the COVID-19 daily death counts rising through June. With pressure on states to reopen, there is no telling what things will like this summer.