I use a combination of gatorblades and a tow behind Cyclone Rake. I finish mow alittle over 4 acres and that combo I use doesn't require bagging on every cut.
Generally if I keep up on the cutting which is once a week the gatorblades disburse the clippings so well that bagging isn't necessary. That said, I do build yearly compost piles so I end up bagging around every 3rd or 4th mowing. When I do my bagging run, I side discharge (sans the CR) into several long windrows then mount the CR and go back & pickup the windrows. This way I'm not having to make constant dump runs to the compost pile whilst I'm mowing.
Leaf pickup is similar in that I side discharge into several windrows to avoid many trips then go back & pick up the clippings w/the CR.
re. the CR, I've got a long thread around here somewhere but I'll summerize. I have the smallest of the 3 CR models and it holds quite a bit more than a std bagger. But when collecting it's still to small, I recommend going with the mid size "Pro" at the least. It picks up everything I run over and isn't too bad to empty.
It connects to the 3PH and is a static connection, i.e. theres no pivot point so it is easy to manuver and theres no stretching or bending of the collection hose but it basically extends the length of the tractor by another 7' so getting into tight places is a PITA.
The 6hp B&S is VERY LOUD, it requires hearing protection (ear plugs included). I use an AM/FM full cup protector/radio and it does great.
It exhausts a large volume of dust etc and normally it's back and away from you but if you have to do alot of backing up to manuver you can back into the cloud so wearing of eye protection (included) is also recommended. I've gotten to where I wear safety glasses when I mow so this is not a big thing to me either.
All in all it works out great for me. When I was trying to decide between going with a bagger, Cyclone Rake or DR Vaccum I went with the CR as a happy medium. I liked the bagger because it was quiet but it was $$$'s and the DR because it has a solid hopper and the more expensive models also have the built in
chipper also big $$$'s. The CR was the cheapest

Theres some that uses all three that I've mentioned with good results. The key to mowing and collecting clippings on large tracts, the way I see it, is to side discharge into several windrows then "enable" whatever collection system one utilizes and go back and pick the clippings up. This way it doesn't require so many time consuming trips to dump.
One of the pics is shows my 1st collection of this year beside a finished compost pile from last years clippings.
Good luck