Cat,
Don't know that you can catch them on anything, you have to get a sandeel rake, find a sandy bottom that's accessible at low water and rake for them. You'll have to rig some kind of floatable container, tie it to your wader belt, so you have a place to put them. Take a small cooler with you with ice in it, bag the sandeels in a ziploc bag and keep them on ice.
That's the way you do it up at Race Point on Cape Cod. Hope this helps. Good Luck,
BunkerDunker