Hey Jerseygirl...
In this case if shower pan is 5 feet long that will give you a
1.25" pitch overall from end wall to front wall with drain...that is exactly what you want here...
If you like..you can reduce the overall pitch to
1 inch total in 5 feet...will barely be noticable really.
Let me know what you think...but drain at end of shower is not so extraordinary...and proper pitch is needed...so sounds like you're all set here!!
Click on this link to learn more about building a custom shower pan:
How to Build a Shower Pan
It shows a rectangle shower with center drain at the above link but all the principles still apply here!!
Are you sure you aren't interested in purchasing a
PREFAB 5 foot molded shower floor??
Click on
Swanstone to learn more about 5' prefab floors with left/right end drains.
MARK