You wouldn't be allowed access from the south stand, you would come through the East terrace gates. That requires toilets to be put on and you wouldn't hire terrace for 50 or less in the first place, it would make even less sense moneywise than the average 180 - 200 that occupy part of the south stand currently.
Thus the whole suggestion is a nonsense, which is why I pointed out the above.
Ground safety rules for Halton Stadium are to a higher spec than some of the smaller grounds you attend. Which is why you have stewarding anyway. (even if there were only 50 of you)