Will the next spin reach the bonus round?
Choosing to spin Big Bass Halloween means accepting that you cannot know in advance how often the bonus round will come. The result of one session is random, and the RTP does not change that for a single visit. Each spin stands alone, so a long quiet run says nothing about the next spin.
Deciding which RTP version to play starts with the game rules, because only the rules show which version runs on Spirit Casino. Read them before the first spin rather than after a session has begun, and keep in mind that the RTP is a long-run figure, not a promise for your next visit.
Weighing the top prize starts with the maximum win, which Big Bass Halloween caps at x2,100 the total bet. That ceiling is reached very rarely, so a single session should not be planned around it. Keep the bet size you can afford in view while you read the paytable.