Funny thing is this. We will spend thousands on cameras, thousands on laptops, and thousands on mounts and scopes. Yet will we spend $300 or $400 on a good set of high amp-hour deepcycle batteries? NO WAY!
If you get yourself three 70Ah marine batteries from supercheap you can run it all for nights on end* and your electric blanket** to boot.
*(for at least 3~4 nights... or so)
**(depends on the setting on the electric blanket)