I bought the least expensive archival boxes I could find. I went to an art store (Utrecht) and bought thin acid free tissue to put between prints.
Nicole, take it from an old fart the photos will only increase in their worth to you as time goes on.
I would not stop there. Any negatives that you will not be printing from for the forseeable future put them into archival sleeves, in a box. Cover the box with aluminum foil. Put the box into a plastic bag and freeze your negatives.
If part of your processing regimen includes selenium toning which reduces the amount of development need and gives finer grain..particularly for the 35mm user the negatives will have even better keeping qualities.
Nicole, you are producing some gems.I t would be wonderful if some lucky person could print them 300 years from now...and they would be extremely valuable.