Breakers trip because the current trough them reaches their max capacity. If you are tripping a factory 30 amp installation, shouldn't you first figure out why? What are you using above an beyond what the factory thought was adequate? Have you searched this and other forums to determine if your trailer wiring of 30 amps seems marginal? If it is tripping at 30 amps, and all is stock, then there must be a problem somewhere that should be addressed. If you need the extra capacity for electric heaters I understand, just hate to see you ignore a problem and it become a nightmare later.
If you have done house wiring, you know the drill. Get an AMMETER and start checking each circuit, one at a time, at max load for that circuit, in other words, all appliances on. Now make sure each device is drawing the proper current, and add them up for TOTAL MAX load. Don't forget the electric water option if you have it. Good Luck, and if you just add the 50 amp without checking first, please don't camp next to me, I like may camper and don't want it to catch fire.
Electricity is not like a snake, a snake you can see before it bites.
2012 Ford F250 ext. Cab 4x4
2002 Jeep Wrangler Sahara
2008 Yamaha V-Star 650 Classic
2008 Work and Play 18LT