Why not try the idea of a transfer line from 1 bucket to the next several times in series. If you try that, just keep the buckets in succession always down hill and keep the lines tight bucket to bucket. If you want to vent, put a small breather hole in each lid, but have the overflow tubing fit tight, and close to the top of each bucket.
In my 1st season I had up to taps on a 5 gal jug (that I got from a Chinese restaurant, I cleaned them well which wasn't easy. I don't recall any over flows, but I emptied them 2x daily.