There is a mod called WalkAbout that allows you to spawn a Kerbal outside of the buildings around KSC. Currently with WalkAbout and Snacks installed the Kerbal is spawned with 0/0 snacks. Would it be possible to get a check for that? If the kerbal doesn't have the resource limit set at all give them one.
Also, now that snacks are 3 meals per day, do you think 1 snack for eva is still balanced? Looking at the old mod features it had the following:
Kerbals on EVA take 1 snack with them. This should be enough for about 2 Kerbin days. Plan accordingly.