Don't get the package deal!
Unless you are planning on everything, and I mean everything (serving fish or filet mignon plated meal, a traditional cake, full open bar, linens, etc) it is not going to be beneficial for you to just accept the wedding packages your venue offers.
Every "wedding" venue plans dinners for a myriad of other events (work luncheons, funerals, dinner parties, etc) and they have a completely different menu and "extras" options for those types of events.
Make sure you carefully compare pricing, but if you're planning on skipping anything that comes with your venue's wedding package, or subtituting anything (i.e. a chocolate fountain instead of a cake), it's very likely that paying for each item you choose, separately, will save you a great deal in the long run.
By serving wine and beer on a tab basis (versus an open bar), and bartering for a chocolate fountain, we are going to save around $4,000 on the reception!