I'd really consider the vintage bus from Hebden Bridge. I think it's free (donations welcomed). Metrocammel on here may be able to advise.
The fare to Hebden Bridge is half that of Keighley, and I'd have thought it would take a lot less time too. I have heard the journey over to Oxenhope is scenic as well.
Hello!
I'm not 100% sure about the bus from Hebden Bridge. As far as I know, it is free, but you can give a donation.
My friend's ex LT / Chase Leyland National (LS68 - OJD868R) will be running a service from Bolton bus station to Ingrow, via Todmorden & Hebden Bridge on the Sunday only. As far as I'm aware, it will be leaving Bolton around 9am, and then returning after the last train from Ingrow. Again, it is a 'free' service, but donations towards the upkeep of the bus are welcome.
If you're coming from Adlington, if you do the Sunday rather than the Friday, it may be an idea to take advantage of this service, as it'll be far cheaper than any other alternative!