Sabrina, you could try my grandfather's old method of putting a board of wood near the plants. The slugs should hide under it during the day because they need to be in a dark moist place and come out primarily at night. Then in the morning when the sun is up you can scrape them off the underneath of the board (use gloves and some kind of scraper so you don't have to touch them) - scrape them into a bucket of soapy (or salty I guess) water. Or you could use his other method of sinking an empty food can, such as for sardines or salmon, whatever you get there, and filling it with beer. The top of the can should be level with the soil surface. The slugs are attracted to the beer, fall in and can't get out. That's assuming no animals are likely to take a swig of beer - I would be leery of that method here because I'm not keen to encounter an inebriated skunk
If neither of these work or appeal to you, get some diatomaceous earth (DE) and put some around the base of the plants. You should be able to get it at a garden centre.
You can sprinkle salt directly on the slugs, but don't keep sprinkling it on the ground. Daylilies are quite salt tolerant but eventually it may accumulate too much. In ancient times salt was the first non-selective herbicide as far as I recall. Some people use household ammonia for slugs but I haven't used it and would have to look up the dilution - maybe someone else here uses it.
