We try to use the lounge every trip, or whenever it's convenient. We're often there in late May ,early June, so it's hot out, and the DVC lounge is a great place to get some AC, a Coke, and charge the phones. I wish they had them in every park.
In Oct, we did have to wait just a bit to go up. Also, we have been there when there are no seats, and we just kinda sit on the floor or the ottomans.