It would be good to find out how much each device uses, add them together and add 10% to that figure. This way, you can plan for power needs. My trailer has two of the 13 watt lights and 6 of the 40 watt tube lights, Lighting = 266 watts. Plus I have a 500 mw charger for my two way radio, I will have a second one here soon, so x2 which is 1 watt total, then I will be purchasing a mobile ham unit as money comes available, that will consume about 50 watts when transmitting. Communication = 301 watts. Kindle 9 watts, laptop 100 watts, network stuff about 30 watts for computer = 139 watts. All the radios that I mention have multiple transmit settings and they won't be on all the time or transmitting all the time.
AC: 266 watts/120 volts = 2.22 amps
If using a dc to ac inverter, I suggest x10 for amps to make sure you have enough reserve power.
DC: 440 watts/12 volts = 36.7 amps
For a generator, this would be 706 watts and 38.92 amps. I calculate for mostly highest need. This way, I can make sure I have enough power.
Seeing as though these things won't be on all the time, I probably won't need all this all the time or all at once. So, I turn things off that I am not using. Like the radios will only be turned on when needed, as will the generator in that case. 9 watts for the kindle while charging and maybe 100 watts misc. 120 watts at any given time.
I am looking up and saving up for a generator and solar. I would prefer solar because of the quiet power, but generator for large need is good.