sorry on the title I meant mulch...not much =)

i don't think i'd use bark mulch with grass seeding. or straw really, just keep it wet and you should be fine.

Yes, just let the seed be in the company of air, sprinkling and sunshine and let it grow naturally.
There's no need for putting something on top that will deflect such from the seed.

Some say 'well, it will keep the seed from being eaten by birds'.
In a 5 lb bag of lawn seed, there are approximately....
well, I have no idea just how many seeds, but there's thousands and a bird cannot possibly remove what will mean anything.

You want something that will disintegrate as the seeds germinate and the seedlings are sprouting so they are exposed to sunlight. Bark mulch won't disentegrate, at least not nearly fast enough. Either go with nothing as mentioned and keep the upper inch of soil moist or go with something that will not block germination and seedling vigor.

I've found that I like using about 1/4" of peat moss (and seeding on the soil surface). It's light enough not to interfere, but sturdy enough to mulch in some water.

If that's inconvenient, using nothing at all is just fine.

Step on the grass seed to push it into the soil. This helps keep the seed coating moist against the soil and helps with germination.

Rent a slid seeder, or get some PennMulch if you insist on putting something while seeding.

I always use nothing when seeding, it works every time.

Just keep it moist, don't water for 15 minutes, or 10 minutes or 5 minutes, just keep it moist and water by hand if you can.