It will work fine. Though they say to level the area out they don't mean perfectly flat. For rain etc. a patio should be sloped 1/4" for every 12" (away from the house of course). Good luck with your project, it sounds like it is an oasis in the making.

Thanks for the input. Unfortunately the slope is sideways to the house. I will have to do some kind of drainage prior to the swimming pool, but I needed validation that I could slope the pavers first.
I appreciate your input.

I'm "seconding" the idea that some slope would actually be required to facilitate drainage. There is a range of slope that works with paving and 1' of fall over a run of 50' fits within it. However, the slope must be in the right direction to make water behave properly and the path of drainage must be carefully thought through. You might want to explain more about your existing conditions, including a photo if it helps.

If it really is dropping a foot over fifty feet, that's about perfect for fall at 1/4" per foot (it leaves you 0.5" shy but as long as you're better than 1/8" per foot you're fine).

I assume by "sideways to the house" you mean it slopes from one house corner to the other? That's no problem as long as the water then has somewhere to go. Just bear in mind that any horizontal line on the house (siding, mortar joints) will make the pitch of the patio very apparent. Some people don't care, some are REALLY bothered by that. Decide which camp you're in first.