I think a lot of Disney Brides have the same problem. I know I do. And I think it makes it tougher because you live in Florida, so you would expcet more people to come. We always get the question, "Why are you getting married in Flordia and not here?" It's annyoing since we still are getting it from family who have know about the wedding for almost a year now. When I decided to get married in Disney, I told myself, I know many people are not going to be able to afford to come, or might just not want to spend their money that way, and I wasn't going to let it bother me. And I think I have been doing a good job not letting it bother me, even thought it has been tough hearing people we thought would come are not. DF is not having such an easy time, and keeps getting really upset when someone in his family talks about possibly not coming. It's such a hard situation but I think in the end you have to worry about what you want for your day and try to let things you can't control go. Good luck and I know your wedding will turn out beautiful!
I had to cover this topic several times in my newsletters too. We tried to explain 1) why Florida; 2) things to do besides theme parks; 3) cost expectations depending on if you were making it a vacation, etc. I can't remember if I send you my newsletters a while back or not (I think so, but maybe it was the scavenger hunt). If you want to see how I covered these topics let me know and I can email them over Also, check to see if a lot of family are flying you can sometimes set up group rates through the airlines. I did this with my family from Michigan for rates on Airtran.
In the end, anyone who doesn't come you can't let it bother you. As my one aunt told me when I was upset about some relatives not coming, they are the ones that are missing out on a once in a lifetime experience.
We had the same problem. So when we sent our save the dates we sent a newsletter that was very detailed in what they can or could not do in Disney and about what it would cost them. I also reminded them that since they are there for a wedding they get cheaper rooms and tickets...so hey if your going to Fl all the way fron NJ why not make a family vacation out of it! Some people are still not that happy...But you know what...i dont care...this is what we have always wanted and everyone who really matters will be there and not miss it! Stay positive! It WILL work out! Good Luck