Here are the details of the major components of the system. I also have various items like a battery fuse and a panel circuit breaker. I tossed my batteries because they were toast after 6 years of abuse. You will need at least 200 Ah @ 12V. I would recommend Sonnenschein sealed batteries, but they are super expensive. The AGM type can work well. Mine lasted 5 years without a hitch.
The entire system is probably overkill for a small camper, and it weighs a fair amount...but if you have the space and want a nice system this is the way to go. I can leave them with you on Sunday, you can stare at them for a few weeks and then decide whether or not you want them.
Panel is pretty new (2 years old?) KC130TM ($250-300 new)
this is a pretty standard 12 V 100W panel. It is rated at 130 Watts, but you should consider it a 100W. You can add more panels in parallel and they do not have to match. They simply need to be 12 V panels of similar power output (~50-200 Watt).
Charge controller (mine is an MX 60 MPPT, the new version is a FlexMax 60) ($500 new)
This is the key to a good system. Not only is it a fully programmable charger that will automatically equalize flooded batteries, or carefully finish-charge sealed batteries, it is capable of temperature compensating, and it has a Peak Power Tracking feature that constantly monitors the state of the Photovoltaic array and moves along the Voltage-Current curve to find the peak power point. This boosts the total energy available from the array significantly in any given day. This charge controller could handle a total of about 700 Watts of Photovoltaics.
Inverter (mine is an FX2012, the new version is an FX2012T) ($1,800 new)
These inverters are bulletproof, and they will act as a charger when you plug them in and remove your solar panels.