I mentioned the skimmer because it really doesn't matter where the top of the coping/pavers are relative to the water level. It's the skimmer that determines where your water line is going to be. You can fudge that a bit, up or down, but skimmers work best when the water is halfway up, so that's where your water line is going to be. Which means that's what's going to determine how much water is over your ledge, not the pavers.
I do believe a cover will reduce evaporation. But even with that, I wouldn't want to own a pool without an auto-fill and overflow system, like the one I mentioned. If you have neither fill or overflow, you'll be doing both manually: pumping out water when it rains a lot, and filling the pool with a hose. You won't be able to add either system later. It's a nice convenience, but in your case it's also going to help with keeping the water depth over the ledge just how you like it. Keep in mind that a covered pool still needs to breath, so you should uncover it some amount of time (UV is good for pool water, and pools need to off gas chlorine byproducts). So you will be getting evaporation even when you're not swimming everyday. I don't cover my pool so I'm not sure about how often you have to uncover it. Daily would be my guess, others here will know.
@mknauss?
Regarding conduits and pipes... Yep, now's the time to plan for all that, because once the pavers go down it'll be too late. A partial list, plus whatever else you can think of:
Water:
- drip irrigation lines
- sprinkler lines
- hose bib (for watering or washing down the deck "from the other side of the yard"
- a line to fill your fountain (that you might have someday)
Electrical:
- garden lights circuit
- bistro lights circuit
- other lighting circuit(s)
- bug zapper circuit
- spare outlet circuit(s) to plug things in, like power tools, pool robots, etc
Media:
- video cables (surveillance for security and "pool watch" while away
- speaker wires
- ethernet cable (to extend wifi)
Other:
- Gas line for BBQ or space heater(s)
Sky's the limit. Now's the time.
The good news is, you don't have to decide everything right now. Just run extra pipes and conduits and drip lines and stub them up above ground, before they backfill and install pavers. You can later decide what you want to use the pipes for (drip or sprinklers or hose bibs) and you can pull just about anything electrical through the conduit later. Just throw down a lot of each, plus a few spares, and they'll be there when you need them. PVC is relatively cheap. You could do some or all of that yourself.
For water you use regular PVC 90s and 45s to get around corners. For conduit you use the sweeps (see below) so that you can later pull wire through them. The less bends you have in a run the easier it's going to be to pull wire through. Four is the max, less is better. White PVC for water. Grey (electrical) PVC conduit for electrical. Use the correct type glue and primer for each. Use larger diameter conduit then you'll think you'll need, to allow for adding more wires later. Keep 120V wires separate from low voltage stuff (separate conduits). EZPZ.
*Enquiring* Minds Want to Know! 
