I'm always in 2 minds regards clubs like Burton, Fleetwood and even Wimbledon in the 80's.
It was a fairy tale when Wimbledon reached the PL but our lowest gate of the season used to be against Wimbledon, it was seen as the least attractive match and they would bring normally 100 supporters.
It a fairy tale to see Burton in the Championship. The Pirelli stadium only holds 6,900 but in their best ever season they've failed to fill their home end once this season.
Fleetwoods Highbury stadium holds only 5,300. Sunday is the biggest match in their entire history but again there's plenty of tickets left in the home end. If we play in the Championship they'll struggle to take 100 away fans to their matches. In fact seeing Fleetwood in a Wembley playoff final could be really strange because their popiulation is 25K, so they will do well to take 10K to Wembley.
Once the novelty wears off, there's little attraction to playing clubs like Wimbledon, Burton and Fleetwood.