This note seems just about adequate for its purpose but is unlikely to set its recipients' hearts racing: its tone is highly formal, and you hardly reveal anything about yourselves. (For instance, you don't even mention the name of the daughter you married off five years ago.)
The flow of your sentences, which tend to be short and stark, would be smoother if you joined some of them together in a way that made the connection between their basic ideas apparent. For instance, you could modify "The next few months will get pretty hectic. If there is anything we can do, please let us know" to read "The next few months will probably be pretty hectic, so if there is anything you can think of which we can do to lighten the load, please let us know". Similarly, I'd also suggest rewriting "Since we have had the opportunity to meet her, Linda has held a special place in our hearts. We know why Ed has chosen her to be his wife" to read "Since we became acquainted with Linda we too have a special place in our hearts for her, and can easily understand why Ed chose her to be his wife".
Apart from these specific suggestions, I would recommend you work in some facts about yourselves which give an idea of what sort of people you are and introduce some much-needed warmth into your message - after all, you are going to know these people for a long time, so you probably want to appear as though you are being actively welcoming towards them rather than just going through the minimum motions dictated by wedding protocol. Perhaps you can make a more specific suggestion to them about meeting up before the wedding?
Finally, I was puzzled by the comment "It is this time of year we wish we were back home in GA". Why particularly at this time of the year? It might be better to leave this remark out unless you can relate it to the rest of the note in a way that makes sense to your intended audience.
Reply from Erik Kowal ( - England)