I have a couple that would like a natural retaining wall planter of tyndall stone in front of their home. A have a few questions for the pros. The rock is 8" and 12" wide 8" high by 6" deep cut from the quarry with a rough face. I am looking at 2 x 30ft walls If this wall is 2 ft from the house and 3 ft high (will be mortared) a. Will a very compacted base be sufficient or do I need poured piles and a footing? b. If the soil freezes wet will it cause the wall to crack. c. Will a re-inforced concrete load wall just inside the stone wall with 1" spacing be overkill to prevent cracks? Some variables. 1. the frost line is 5ft here 2. the ground is very wet in this area (built on a flood plain) 3. I have a neighbor that is mason by trade that can do the rock. I need to prep the base. Advice Please !!!!!!!!!!!!!!!!