AS,
I Also have the EZ-Slalom course and have been putting it in for 4 seasons.
We usually put it in for 24 hours and then pull it out. An experienced crew of 4 is best the night before (a week end,) one driver, buoy handler, rope feeder and a turn arm extender...
We install it with a 24' pontoon and it makes it much easier. I also use a large steel hose reel from Sam's club (plumbing side froze,) for the mainline to save time not having the weights get caught in the plastic sides of the reel. I now fill the turn and gate buoys with water to keep them low enough to keep the skis from hooking them.
A few things have gotten cut or worn now with almost 5 seasons...the buoy hooks are getting damaged from newbie drivers (cut buoy and bent fish stringer hooks.) Some of the elastic cord also got cut or is wearing out. But repaired with surgical tubing and zip ties...makes a fast repair.
There is a permanent course anchors in the lake that we are going to start using as we have run into the shallow water and very high weed growth this year.
We also found that you will lose the gates in water over 50' without adding rope on between the course and the anchor.
I wish I had order the pre-gates model and not the mini course since the mini is easy to add and we do not use it all that much.
I hope this helps there is a learning curve, if you can find someone who has one and go out with then twice you will have a much better idea on how to get it in with less trouble...we have learned not to say it is easy until we are skiing.