Are you 100% sure about that? From the Ram website for the 3/4 and 1 tons:
The recommended tongue weight is between 10 percent and 15 percent of the gross trailer weight. However, the maximum tongue weight on Class III (the bumper ball) is limited to 500 pounds, and Class IV (the receiver hitch) to 1,200 pounds. Additionally, the GAWRs and GVWRs should never be exceeded.
Either way, I would get a towable solution. If storage space is an issue, there are plenty of folding trailers available, such as the following, to name a couple:
I guess there's always this option, but it looks like such a recipe for disaster that I'm not even going to include a link: