Go get a Marinco type inlet. Then a small breaker box...usually 4 will be the smallest.....any electric supply will have it. Then circuit breakers for the box....I use double ones so I can have eight separate circuits. Make one a 30 amp for the master inlet source. then 12 x 2 romex to your outlets.
"If it can't be reduced, reused, repaired, rebuilt, refurbished, refinished, resold, recycled or composted
then it should be restricted, redesigned or removed from production."