For only 3 months...I catch a lot of fish Jake all year long..Just put them in a zip lock,,if it's only 3 months..I catch alot of crappie in the winter..I mark the date on the baggie and eat older ones first..If its only 3 months no problem..then I take them out and thaw in saltwater for a couple hours..The main thing..I keep mine in the deep freeze..The bass can have worms so I set my deep freeze at 6 below zero...they reccomend 10 days of this will kill any parasites you may not have seen in your fish..Just a safety measure that's all.

Much less space than a block of ice..I've done both..but if it's only 3 months not necessary