SmilingKnifed,
Jurys Inn is the closest I think, but can be pricey at times. The Premier Inn on the Bath road worked well for me. If booked in advance as crew and on presenting your ID at reception its 45 pounds; which isnt bad at all. If you are flying into LHR there is probably a 'Hoppa' hotel bus, but you can get a local bus from central bus station for a couple of pounds. Several go past the hotel so check on Transport For London website. To get to Cranebank you can again get a local bus for literaly 3 minutes, get off at the big cross roads and it is 4 or 5 mins walk to The Rivers. Alternatively you can probably walk it all in 20-25 mins. You can even get a Costa coffee downstairs on your way out for your morning jaunt whilst comtemplating the fun ahead.
Hope it helps, best of luck to all.