Duh yeah, it's monsoon season! Don't know about ACASS since they screwed me over but I know they screwed over lots of guys when I did contract work for them.
Yep, I can give an opinion because I worked for them. Let's see, humm. First couple went ok. I was low time then so flew as a co-pilot. First guy was a psycho who was fired very quickly for his mouth. Replaced him with an idiot for who later earned my respect.
Next contract was still as co-pilot/seat warmer, flew with a complete psycho again (aircraft was down for maintenance and would be that way for at least two weeks while this guy is telling me when and where to go and that I should report to him daily...NO FLYING FOR TWO WEEKS NO AIRCRAFT AVAILABLE....HELLO control freak) I quickly set him straight.
Last but not least. The final contract ended abruptly when yet again I was saddled with a complete idiot who had never been a corporate captain, never seen a VIP and the only jet he had ever flown was the one we were flying because he was a SIM INSTRUCTOR!!! He got me fired after a few weeks when the client was bypassing his four stripes and coming to me for help and advice and flight schedules. Oh yeah, flew home from the Far East in Coach. Direct conflict with the useless 'contract' I signed AND had a real problem getting paid. Had to go to the top of the chain to freakin get paid.
Get your money up front. I know you won't ask for it but anyone who is doing contract work needs to get paid UP FRONT. A real problem with contract pilots, well actually two, doing it for too little pay and flying with psychoes who cant keep regular jobs 'cause they are freakin psychoes.
Now if your some kind of a** who wants to give me a hard time 'bout my negative post, attitude or grammar go ahead I LIKE IT!!!
Well I've taken care of your spelling and (some grammar/punctuation) free of charge which reduces options for a fight. Next time I'll charge you though. 
Duck