Dalby is a good solid ride, you just need to be fit enough/ pace yourself and fuel up a bit during the ride. If you start flagging during the latter stages it can be a real dirge but if you have something left you can have a really good go at the end sections and its good riding.
It a 2 banana, 1 piece of flapjack, 1l of water ride in my little world.
I was there last Friday and it was still 7 quid to get in.
Hopefully the recent rain wont have created many puddles of grind paste for you to collect on your drive train.