I think I might have to get the 50 for longer hauls! I just don't want to try lifting a full 50 gallon one stair to stair on say the great escape or the peace boat!
When I dive on the boats many times I just take the Akona bag if I don't know the operator. For the Great Escape (just take the tank off and BC out before hauling it up the stairs) , I can go either way but usually just take the bag. On smaller boats like to Lois Ann or Sea Bass, I just bring a mesh bag and a dry sack and leave everything else in the truck.