I think purchasing a lock on type stand would be a very good idea. From year to year you never know what may happen in your woods to change a deer's pattern. A tree may blow over a trail leading to your permanent stand causing the deer to change corse, pushing them just outside your effective range. Food sources may become non existent where they once were, water sources may dry up, bedding areas may change. You never know. Having that extra mobility would give you the upper hand in this situation.