It''s a beautiful ring. Have you given any more thought to your proposal? I would also vote for doing it on the day of your engagement. If you''re concerned about security in Central Park at night (which is a valid concern) have you given any thought to doing it before dinner while there''s still daylight? Then have a celebratory dinner, evening, etc.
AJM, I''m a fellow Jersey Girl, and would love a carraige ride proposal. JMO of course, but it''s one of those things I grew up hearing about. A proposal by the tree in Rockafeller Center sounds lovely too. All the best, and looking forward to hearing all about it!