Tack or not at a baby celebration

I am currently pregnant with baby number two.

We have everything we need for our next baby because our first is only 22 months. We also live in a two bedroom home that is only 1000 square feet.

We don't want a baby shower but would like a celebration of our new addition.

We don't want gifts but our family is extremely gift giving no matter how much we let them know we have no more room in our house.

would it be tacky to say "we do not need gifts, but if you would like to give we have a college fund account set up"

If you think that is tacky, how else would you word it?