Hi i agree with KizmetRanch yet again.

the only thing to add to that (sorry not sure if you did mention this?), re: going in and out on your terms not hers- if she does come out without you asking her to, send her straight back up.

Also I prefer to stand on the tailgate and just send my horse into the float, that way by the time they get the front half in you can give them that little bit of encouragement and close the trailer yourself and then go and tie them up.

Looking forward to your update.