Wondering About Charitable Remainder Trusts

I’d really like for my estate not to end up in the hands of the IRS. So I’m checking out
Charitable Remainder Trusts. Looks like a good potential way to go.
I’ve been reading up on Charitable Gift Annuity trusts online. Frankly, the more I can give to micro-lending programs and the less to Uncle Sam, the better.
There are so many great causes in need of funds - it’s hard to decide which is most deserving. One thing is for sure, though - the IRS is not on the list.
I’ll be looking forward to your comments.