Well I hate to be the bearer of bad news but you will likely be out of your on transporting all your guns for sure. Airsoft has not evolved to the point it has in the UK (nice job done over there by the way). Best advice I can think to give you is to sell it all off and buy again here. Customs will likely seize it all upon discovery
Good news is Ontario has a strong and healthy airsoft community, can replace some of your collection fairly quickly I can imagine!
Best of luck on the move.