My preference would be #3 double longs, if legal on land, but again, just my preference.

They are two differ animals with two different styles of trapping. I would get different traps so you aren't handicapping yourself.

Bridger #3 dogless would be my first thought. Have used them an mb550s on caster mound sets. Both caught beaver for me. I'd say the Bridger due to larger jaw. Both are proven yote traps

Jakes do double duty for me. We are required to use rubber jaws on our permits. I have rubber jaw MB650, MB750 and Jakes. The JC Conner traps are my preferred foothold.

Bridger #3 and mb650 have served me well on both coyotes and beaver. I've grabbed the bridgers on many occasions when I run out of 750s. They also work well in high theft areas for me. I've caught several beaver in 650s also if I'm out of beaver traps. I don't like the smaller trap size and they're almost impossible for me to set over my knee in water without setters, but they will work if you're in a pinch.

For dual use, single trap, a #4 Sleepy Creek longspring