I tend to like the S-shape hooks on the end of light singletrees, because they don’t make the slots enlarge, like the various types of sword end singletrees can do.
The trick using the S-shape hooks, is they need to be almost vertical, not laying in the same direction as the wood of the singletree. This means you have to lift and slide the slot over the S, then push the trace down level with the wood in hitching the horse. With the S-hook upright, the trace can’t wrinkle if loose and come off the hook.
We learned this when a couple “old guys” asked why we had a bungee going across the singletree? “That is to hold traces on, one will wiggle off it there is slack” I said. They laughed, said we hadn’t reset the hooks from “factory settings” which are flat for shipping! Just a little crank on the S-hook to change it to a more upright setting with a pair of channelocks, and we NEVER had a trace come off again!! S-hooks screw into the end of their singletree, so it is an easy fix.
I would agree, in getting all your vehicles the same style singletree, so your harness goes well whatever you choose to drive that day!
Word of warning, do your sleighbell practice UNHITCHED, get horse calm and quiet with the noise before you hitch him with bells on.
Second bit of warning, is that your sleigh runners MIGHT freeze to the ground while hitching or stopping and standing for a little time. Teach STANDING horse to STEP LEFT, then STEP RIGHT with a gentle touch of whip on barrel of horse, before asking him to “walk on”. Doing this sidestep will break the runners loose, so he can move forward easily. I have seen some UGLY scenes with NICE horses who had never pulled a sleigh and couldn’t go forward with frozen runners. Rearing is common!! Few horses are used to really taking loaded weight and leaning into it to move ahead. SAFER to do the side step and break the runners loose, THEN ask for forward. You can practice the side step in a cart, so horse learns the commands well, ready when you need them!
Sleighs run on a layer of water over the snow, caused by friction of the runners. So when the sleigh stops moving and it is cold, the water layer freezes the runners to the ground. You do NOT want to surprise your horse with a frozen sleigh, so do your sidestep to help him free the load before moving off. Sleighing is FUN, sounds like you have a great winter coming up!!