High Output alternators?

How big of an alternator could / should I go, and at what cost?

I didn't realize I already had a 135 amp alternator. I'm thinking about getting a 2 or 3k amp power inverter to hook to my truck batteries and running a heavy ext cord to the shore power of the camper, in lieu of a generator. This would replenish my camper batteries after sitting awhile running fans, furnace, lights, etc. I could crank the truck for 20 or 30 min occasionally with a high put alternator to replenish the truck batteries. Anything wrong with this thinking?

I often wonder what I could do with the factory 220a alternator that came on my Ram. Sometimes I'm tempted to beef-up the charge line running to my trailer, but that's next to pointless because of the computer controlled regulator.

I don't see why you can't change out your existing alternator to a higher output one. My GMC came with a snow plow package that included a 220 amp alternator.

Your truck already has a 135 amp alt. Not sure how you would add a second one and have it get along with the puter. Plus, trying to charge a couple of battery's with 150 ~ 200+ amps is going to boil them hard.