My seal is not even all that tight and I don't have issues. That is mostly on me for not working to make it tight, I'm sure if you had some weather stripping or rubber type gasket around the edge of the lid it would be VERY tight. You could always look for some small 90 degree latches if you really want to lock it down. If they are small and a darker color I don't think you would notice them under the lid / on the side of the coffin. Something like below.
I also have 2 Eva-Dry Wireless Dehumidifiers in the freezer that really help with any minor condensation. If you don't know what they are just google them, they really do pickup quite a bit. I just recharge them every month or 2 when swapping a keg.
Anyways if you do really want rear access go for it, just pointing out the potential trouble of getting at the taps. I fully disassemble my taps every 2-3 kegs for cleaning, but if you are not crazy like me, it would not be as big a deal.
Cheers