Joined: Aug 2010
Posts: 12,748
Likes: 2,108
From: Madison, WI
Bikes: 1961 Ideor, 1966 Perfekt 3 Speed AB Hub, 1994 Bridgestone MB-6, 2006 Airnimal Joey, 2009 Thorn Sherpa, 2013 Thorn Nomad MkII, 2015 VO Pass Hunter, 2017 Lynskey Backroad, 2017 Raleigh Gran Prix, 1980s Bianchi Mixte on a trainer. Others are now gone.
The Nashbar ATB are top loading and there is a big pocket in the lid. Sometimes they are on a good sale price, I think I paid $22 for a pair of them a couple years ago, that sale did not last very long. They have steel hooks to hang onto the rack and a bit of velcro strap to prevent them from bouncing off of the rack when you hit bumps. The velcro is necessary for that purpose. Also a bit of bunge on the bottom to hold them against the rack.
For a four day credit card tour, any of these would work.
I used the Nashbar ATB for front panniers but I was carrying a load of camping gear.