We were there yesterday as well. It was a gorgeous day. Perfect weather. Halloweekends at CP are a total blast and our kids will have life time memories.
The arcade was hopping pretty well. The pinball machines are in average shape. The Fireball took my money as well as one of the old Sega Combat games. The Williams Grand Prix and one of the Hercules both played pretty well. CP has two Hercules machines. There were a fair amount of kids and teenagers playing pinball to be honest with you. They also have a few old EM shooting games some of which work alright.
As for rides, if you are not into the newest and greatest, even on a busy day you can have free reign of some of the older ones. My daughter is 9 and her and I rode the Gemini 4 times, Corkscrew 3 times, Iron Dragon 3 times, Blue Streak 3 times. The Gemini is my favorite from my childhood and my kids all love it as well. My 14 year old sons waited almost 2 hours to get on the Maverick. After that, they just went with us on some of the older ones with 5-10 minute waits.
All in all, a great day at a great American amusement park!