whilst im not doing it personally, i can say theres no right or wrong answer when it comes to weddings! you want a private wedding then its completely your choice =)
i think private weddings can be very romantic, and you dont need to worry about your guests still being around when you want to start your honeymoon hahaha (lord knows how ill manage to make sure 100 guests leave us for alone time...i think we will have to change hotels!) there are definite advantages to doing it your way (less expense, private time etc) so don't feel like youre crazy. its probably crazier to end up with a whole bunch of guests you dont want there! take me, my dream wedding would be around 50 people, fiances idea of a wedding is way way bigger so we compromised on a "small" wedding of 100 people. 100!! so for me, i can totally imagine doing what youre doing were it not for the fact it would lead to a nightmarish amount of drama from my family and future inlaws!