I know this has been asked before but again can some tell the best way to care for a velvet buck till I get him to the tax. If I get it in the freezer right away will it be ok.

YES

Anything else I need to do to presure the velvet?

I found this site that has a few ideas for preserving velvet. Here, hope it helps

http://www.taxidermy.net/forums/BeginnersArticles/05/h/05E4123678.html

Freeze em and get them off to be freeze dried. Late season velvet antlers, those that are fully formed and gone through the hardening stage ( late August and September) can have the velvet treated, but these early stage velvet antlers must be freeze dried.