The text field can only accept 255 characters and alas, that is a hard limit that cannot be increased without making substantial changes to the underlying architecture of the website (something I can't do without a tremendous amount of effort.)
The only solution I can think of is to try to make the text you're putting in as abbreviated as possible.
Alternatively, if there is going to be a bunch of different Biltmore awards, then perhaps we should add a new series of checkboxes just for Biltmore awards. Something like:
"Biltmore Awards"
and inside there add checkboxes for the various awards they offer.