do you tow a trailer?

[slabo]

I plan to bring some camping gear with me on my trips. I will get my Shineray long march in almost 2 weeks. If i am alone, i can pack everything i need on the bike. But if we are two on the bike, it would be nice if we are pulling a trailer. Being the cheapo i am, i would prefer not to buy anything but build my own. example. this is used to tow a barrel. Not what i need, but close enough. See attachment for easier viewing. I will add a handbrake to the trailer.

I will not carry more than 60 kg; that's a tent and sleeping bag, two foldable kayaks(each fit in a golf bag), and maybe a paraglide wing sometime. Anyone see any problems with this setup? The only thing i cannot figure out is how to attache the trailer to the bike, maybe some kind of a ball socket?