If we are using one deck for a tournament, is there a recommended number of players to cap the tournament at?
I’d suggest a 20 player cap for a single deck tournament.
And more decks is better! You’ll lose some cards over time from people forgetting to give them back or dropping them in dog poop outside the venue etc. so if that’s one of the singular cards that sucks to lose one of them. I almost always use two decks for any group smaller than 36