Weddingbee boards

In case you've not read any of my other million questions, FI and I are having a very non-traditional wedding ceremony.  Our ceremony will be held in the field where we are planning to build our future home.  It's a lovely location, and is going to be beautiful.  We are only having 22 guests, all of which are close family/friends.  Here's the question...

How do I start the ceremony?  The field is very open.  I'm trying to decide...

1.)  Where do I walk from?  Should I have a car/limo parked at the end off our aisle runner, out in the middle of the field and just wait in the car until everyone is seated?  Or, do I just not walk down the aisle (I really want to though)...

2.) How will the guests know it's time to start the wedding?  I have it in my mind that everyone is going to be up and socializing, because our families are just that way.  What will be their cue that it's time to have a seat and start the ceremony?  I'm planning to have music playing when everyone gets there, so how do they know that it's "my song"? (I'm not coming in to the bridal march).

THanks in advance for your help...I'm open for any suggestions from you bees who have had/are having an outside wedding in an open location...

Sorry, I should have said...No attendants, and parents aren't walking down the aisle.  It will just be me and my 2 year old daughter.  Yes, that would be a great idea about not arriving until it's time to start...

I've been to several weddings that don't have the traditional wedding march music and what they've done is have a break between the socializing music and the ceremony music.  Long enough for people to notice a silence, but not too long.  Also change the volume of the music..so you're walking music is a little louder and people will notice. 

Could also have someone announce for everyone to take their places (or go around and quietly tell everyone to take their seats...once a few people do, others will follow).