Ralph, for a float 9 times out of 10 i just clip one of these on with a sharpened matchstick.

River fishing help please-618paiqpkbl._sl1024_.jpg

MagiDeal 12Pcs Tear Drop Foam Float Fly Fishing Strike Indicators Accessory: Amazon.co.uk: Sports & Outdoors

They're tiny (20mm long) take about a BB, or nothing at all with a large worm. I like them because i can go from lure fishing or freelining to floatfishing without having to break too much down.