One other caveat about mapping anything in Gaza - the area was adversely affected by the anti-Israel vandalism such as node drags that was described here (as were places further afield such as Greece and Turkey, because coastlines are connected). A query such as this can be used to search for objects last edited by a user in an area - any edits by the accounts in the linked list are definitely worth looking at. Also, any regular geometry errors caused by node drags are probably best resolved first before HOT mappers start making other changes.
Not specific to here, but the usual caveats for organised editing apply - ensure that it’s clear what editing is being done and who is doing it (to make it easier to e.g. undo any accidents afterwards). Another nearby area (the West Bank) has suffered at the hands of well-meaning humanitarian mapping in the past (to be clear, this was not HOT) - it’d be great not to repeat that here too.