The more you can run from 12v the better in terms of power use, but thigs like charging
cordless drills are difficult to do without AC power.
If guests bring phones computers
etc these can also be charged, but long term you are better getting 12v adapters.
Unfortunatly running high demand appliances
like toasters needs a big inverter, a big battery
bank, and a means of replacing the power drawn from the battery
Note you need all three requirements, which not many small boats have. Just a big inverter is not enough.
We don't use ours much
A stick blender
Running some power tools like corded drill, angle grinder, Dremel