Their last few home league games are as follows...
Exeter 1,892 (incl. 472 away)
Rochdale 2,173 (973 away)
Hartlepool 2,448 (incl. 1,019 away)
Northampton 2,037 (incl. 677 away)
The lowest home attendance there was vs Rochdale and that was still 1200 which means either the gas are such a massive draw that it has lowered their worst home support by about 10% or the number of away fans has been overstated. It's not yet listed on the results page on their website.