I don't really know why you would need a 3000 watt inverter to boondock unless you can't go with out the comforts. 3000w inverter is going to draw a lot of amps and drain those batteries quick. I'm not sure why you would need a 12v 60watt power supply - maybe there is a purpose but I can't figure it out.
If you want to boondock you won't need either. Just get a couple of good batteries and maybe buy the cheap Chinese LEDs.
RAPTOR 300MP
RAM 3500 MEGA CTD 4X4