Well first off, if you go during the week you should have no problems.
Saturday is really the only busy day at Carowinds.
It's hard to tell how Borg will be running then, if it's running I'd say hit it first to get that out of the way as it's usually the longest line.
Most everything else except for the flyers and other low-capacity rides will be walk ons.
Last year was the biggest attendance year ever for PC (over 2MM for the first time) and it still wasn't that bad.
If I go on Saturday I just get there early and ride everything before the crowds come in.
There's a lot of fast food at the Carowidns exit, so you can save a lot of money that way on food.
I wouldn't recommend any of the hotels at the Carowinds exit. They all look a little trashy IMO.
There's some nice ones at I-485 and Hwy 51 (2 exits East of I-77 on I-485) and that area has a lot of shopping and restaurants too.
And as someone already said, the flyers are running great! You'll be pleasently surprised that we didn't ruin them lol!!! Enjoy.
I'll be heading up to PKI around June 1.