Flying skydivers is generally a real blast. The people are the friendliest you'll ever meet, although they tend to be a little on the crazy side. I, personally, have the experience of flying skydivers to thank for getting me where I am now. It really got my flying career going.
I started in a C-206. Carrying 5 jumpers to 10,500' took about 40 minutes. My best day was 14 loads. Flying a King Air B90, I'd take 14 jumpers to 14,000'. Flight time was about 26 minutes. The Twin Otter with -11s (not a Super Otter) would seat 23. With 3 loads worth of fuel, I'd take 17 or 18. Increasing 250 lbs/load. 13,000' would be about 30 minutes. My best King Air day was 29 loads. I fly three loads and then fuel up. Some dropzones have someone to help out with fueling, some have the pilot do it. With a helper, we'd hot-fuel (fuel without shutting down).
Pay varies. Usually, it's a flat rate to show, like $60, and then a per load amount depending on your agreement with the DZO or leasing company. $10-15 per load is typical. I think I was only getting like $5 per load in the 206 when I first started.
It's a lot of fun, I'd recommend it. Just don't ever compromise on safety.
-pj