I also had a late, sleepy, c-sec baby :P
If you're worried about dehydration, it's one wet diaper per day of life, up to 6 days, when it should be 6-8 every day. (So if he's 4 days old, you should see 4 diapers.)
I had never heard about c-sec IV fluids inflating the birth weight! Mine lost 9-10% but was back at birth weight at 10 days. I was more worried about it than my BF friendly doctor, who never suggested pumping or bottles. So thank you guys! (Though hopefully it won't be an issue next time ...)
Waking every hour seems a little excessive -- are you doing that at night, too? (I hope not!) My LC said that sometimes all the gymnastics to wake up a sleeping baby burn more calories than they get at the early feeding sessions. My LLL leader suggested every 2 hours and my doc suggested every 3. Of course, you feed them when they're hungry, even if it's only been 45 mintues, I'm just talking about when you should wake a newborn.
We went in for weight checks at 5, 10, and 15 days -- and were given the green light to stop waking her at 15, so now I just let her sleep! Weight gain is still great at 10 weeks

and I hope it goes well for you, too.