SQL Server : INSERT INTO within a SELECT - sql

Question

In SSRS 2008, my query is in the form
WITH CTE ( *that makes a list of dates, unfortunately only starting from today, not from whatever past date the report demands*)
SELECT
*a bunch of columns*
FROM
asimpletable p1
CROSS APPLY
(*CTE*) dates1
LEFT OUTER JOIN
(*demand list subquery with several selects pulling from several tables*) d1 ON (*simple.PartID AND CTE.demandDate*)
LEFT OUTER JOIN
(*supply list subquery with several selects pulling from several tables*) s1 ON (*yada*)
*..and 4 other joins to subqueries*
WHERE
*enough conditions that I don't want to copy it 6 times for 6 different INSERT INTO statements*
Because the CTE can only start from today, when I display all the select by date, any that was dated in the past are lumped out of order.
So I want to make a temp table to cross apply and feed in all the dates I need. I can see how to do it with 6 INSERT INTO, copying the joined subqueries, but not only would it look ugly, it would be worse to keep all the subqueries in sync.
I liked the sound of this, but can't see how to return the selects nor how to apply it to several subqueries https://stackoverflow.com/a/1101516/5612361.
Reason the CTE idea only starts from today:
SET #CTEStartDate = cast(getdate() as date);
SET #CTEEndDate = cast(dateadd(day,100,getdate()) as date);
WITH Dates(eaDate) AS (
SELECT #CTEStartDate AS eaDate --Select First day in range
UNION ALL
SELECT DATEADD(DAY, 1, eaDate) FROM Dates WHERE eaDate < #CTEEndDate --Add a record for every day in the range
)
When i try to use
SET #CTEStartDate = cast(dateadd(day,-30,getdate()) as date);
I get
For more information about this error navigate to the report server on
the local server machine, or enable remote errors
---------------------------- Cannot read the next data row for the dataset DataSet1. (rsErrorReadingNextDataRow)
---------------------------- An error has occurred during report processing. (rsProcessingAborted)
As soon as I take out that dateadd it resolves without a hitch.