How crowded is the El Tovar patio this time of year?

My husband and I are headed to the GC for the first time next week. He has some mobility and cognitive issues (TBI) so how long he'll last using the shuttle bus to outlooks is really hard to tell. I've read that watching sunset from the El Tovar patio might be a good option. If we decide to go that route, how early should we head that way to be sure to get a table?

And can anyone personally confirm that it would be a decent view for a sunset? TIA