There are times when it feels like it is a bit of a pain to plug in power, so I invested in something like this:
http://www.ebay.co.uk/itm/12V-2A-Battery-Box-AA-Battery-Clip-for-8-Batteries-with-DC-Cover-Switch-/291425322546?hash=item43da4d8632:g:biEAAOSw7aBVDQoh
You have to make sure you get one with the correct output polarity (or in my case re-solder the power plug cable inside the box)
I then bought 8 Panasonic Eneloop rechargeables. I think I managed to do the whole lot for under £20. I now have a stable battery back that I can drop on most pedal boards. It has been a few rehearsals now and I haven't recharged yet!
I like that the box also has a power switch. So if this were attached to your board too, then a flick of a master switch will turn everything off. Further more, when it comes to recharge, you won't have to remove a single pedal.