love the placement! Tree tattoo with family branches I see this as the tree of "LIFE". Every lesson learned allows the roots to become stronger & dig deeper within the earth, thus giving the tree strength to withstand the elements from above.
Balloons with photos of memories tied to the bottom is a sentimental and thoughtful proposal idea. Let her pop all of the balloons to find the ring. You can fill the rest of the balloons with sweets, glitter or flowers.