Nothing helps more with fan excitement than winning. Look at how many bandwagon fans jumped aboard in 2018. That is the ULTIMATE driver of fan participation and interest. Everything else falls after.
As for Dino and running a tight-lipped ship, that is indeed par for the course in college football. Recruiting is a cut-throat business and these coaches are incredibly fearful that one of their peers will be able to gain a competitive edge over them if they have certain information at hand. Some of it is probably blown out of proportion, but they're also correct in being hyper-cautious at times as well.
Unless you're a big booster or have some form of insider contact, it's hard to gain knowledge of the inner doings of the team/personnel. There's ALWAYS loose lips, though...