When do you put the Kong in the crate? If just before you will lock her in, I would change the procedure. Put the Kong and perhaps a couple of other treats inside the crate and lock her OUT awhile before you plan on leaving. Let her know it is there, let her want to get at it. Then open the door and let her have the treats, but remove the Kong. Don't lock her in, but play with her for a moment or so, then put her in with the Kong. Hopefully this will help with the "hiding".
Also, have you trained a "kennel" command? If not, do so and ask her to go in fairly often, not locking her in but instead just giving her a treat. Don't initially ask her to "kennel" when you are going to lock the door, only when you aren't. Eventually…..and with patience.....you will work up to sometimes locking it and sometimes not, but always rewarding her for going in. At least, that is the way I would proceed.
If the above doesn't work for you and she continues to hide, I wouldn't give her the opportunity. I'd arrange things so I didn't let her loose after returning to the house from the walk. No point in "practicing" a bad behaviour.