I don't think teams travel in such big numbers as they used to, look when we play Notlob in the FA Cup back in 05???? they only brought just over a 1,000.
Teams like Birmingham, Derby, Coventry, Forest who you would expect to bring the 4,000 plusses, just wouldn't now, 2,000 probably, and with our home gates going up to 5,000 you'd be looking at that sort of attendance for our home matches i'd have thought.
Obviously your Burnleys would bring a fair few, but i still don't think we'd get the home 'support' up.
Away end fully holds 4,600 so that leaves around 6,000 home seats (7,600 if they gave us the small bit of Rocky), couldn't see us filling that.
all ifs and buts anyway, but in a new stadium, that'd be a different proposition altogether.
Can't find the average attendances for the seasons you mentioned.