Chest Freezer recommendations?

[boxturtle]

I go offshore fishing about 3 to 4 times a year and lucky enough to come home a lil more then i could eat right away. So im looking into investing a chest freezer but not really sure what size to get and what functions i should look for. I thought it was simple until i decided to do a lil research. What size freezers do you guys have to store your catch? Manual or auto defrost?

Thanks in advance