A touch heavier now?

Yeah, made it probably a couple hundred pounds heavier but I know it's a solid trailer and I have far less money into it than if I had gone and bought a new trailer.

My snowmobile trailer currently has 1/2" PT plywood. I'm thinking at some point of putting 5/8" or even 3/4". I also think the extra weight is worth it for the gains in strength.

get marine grade plywood

My plan was to use 3/4" treated plywood, but I would have needed to use 3 sheets and cut one in half to cover 8x10 feet. It would have been over $100 for 3 sheets. It was about $80 for 10 2x10x10 treated planks, and they are stronger and will last longer.

Sold my 2 place tilt trailer and bought a 4 place for same money. I had some rust through and needed new decking. Just got done with it. I think it will hold 5 or six. Just put two sleds on it to test for size. I paid 400 for it.New wood steel and hardware was 2 hundred. Will put new tires on it before I do any long trips.
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Frame was repaired and painted with Rustolem. Wood was painted 2 coats on the bottom and 3 on top. D rings were mounted through the wood in to the steel dead in the center. Yes it is steel but I have an F350 so I dont care. Just made this week end.
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Looks nice, pretty much the same thing I did. Take a cheap beat up old trailer and make it like new again. I don't mind that my trailer is heavy either because I also drive and F-350. :)