The charging limit for most campers is not the alternator, it is the wiring from the alternator to the camper batteries. Start spending your money there. Second is the charge acceptance rate of the batteries. If they are standard flooded batteries you might get the to take 50 amps or so, for a short while, when they are really discharged, but the rate will then drop. Good AGMs will take more, about 0.5C (so 100 amps for a 200 AH battery bank) but again only for a short time and only when really low. This is built into the chemistry of a lead acid battery, there is nothing you can do about it. The want to be charged slowly over a long period - which is why solar arrays are such a good idea.
The alternative is LiFePo4 batteries, these can be charged very fast and right to the top at a high rate. The price may be an obstacle though.