UF is not really recognized for any pool equipment is it? (no insulated EGC)
All the guys I know just say "no" to any wiring that is not necessary for the pool to be inside the 5' zone. The pool digger usually enforces that rule with his backhoe anyway. With the possible exception of a power cover I can't think of any other "pool" equipment that will be there besides the light.
I guess the question is whether you wire before they backfill the shell. Even if it is after, this is fresh fill, should be easy digging. On my pool I did go "after" but that was mostly to avoid stress on the plumbing that I did at the same time.
