Little unbraked trailer.

North Yorkshire Council bless them have issued an edict to the effect that to use the household waste recycling tip one cannot have a trailer over 1.5m bed length.  All mine are over this.  This is mostly because I haven't used little trailers because of the unbraked tow limits for a jimny and because things like the edre 102 and 122 strike me as being a bit top heavy looking and bouncy even with stuff in them. However this is only an assumption on my part. So those who have one or something equally small what do they tow like? Are they more stable than they look? Would you recommend one brand over another or is something more second hand and wooden sided a better idea?  Ideally I would like one that could fit a big materials bag in it though obviously not full of sand more for garden and tree brash.