Hi Laura! Thank you for joining our one big family Wikitree!
You have an admirable gedcom for your own use, but many of those individuals are already on WikiTree and duplicate profiles must be merged into the earliest, first profile number. It is a huge job. Also, each profile that you import has to be cleaned up to make it readable. A few thousand profiles will take years to clean-up. We want you to add any new information and sources that you care to share, but we caution you about the workload that several thousand profiles will require.
Before you import a small batch of your GedCom, I suggest that you browse through a list of one of your surnames that are already here; http://www.wikitree.com/genealogy/Stine You can sort the list by first name by clicking the little link Name. Pick one or two of the open profile names (little white circle on the right side of each record), even if you don't know them, and edit the biography to make it pretty. You will see that the profiles imported from gedcoms need a lot of TLC to clean them up and make them readable.
What is your favorite surname to research? Maybe I can help you link a favorite ancestor with our 1776 Project or one of the other WikiTree projects. Were your Stines from Pennsylvania? We have an Early Pennsylvania Project. Let us know how we can help. We love your enthusiasm! Kitty