Well you got a couple options.
You can keep germinging and plant it in a pot with good soil outside somewhere and then when u get back take it inside and keep growing it.
you can just plant it in the earth and keep growing it ouside
depeding how long u been germing and what the seed looks like if u leave it in the dry and no damp or dark areas u probably could take it out of germing. So ask more people i dont know i never took a seed out of germing.
but ur idea on the extra water
NO NON NO NONONONONO
Its a seedling, youll get root rot, stunt its growth, drown it, to much water.
You would be better off giving it a nice water and then leaving it with no water cause ur gonna be gone for 11 days it would probably survive better than with no much access water at 1 time.