[thinker&planner]

We used e-clips last year, which were great, until we had to take them off without the correct tool.
My advice is to tap the ends of the axles and run short socket cap bolts into the ends with washers bigger than the inner race of the bearings. This allows for much easier maintenance, imho. Just stick a long ball-end hex driver down the frame and you can pull the whole axle assembly off.
Hope this helps!