Snickers is a light draft, yes. He is not that "drafty", long-backed and wide-chested as full (or heavy) drafts, but he has a natural capability and good gaits for pulling, be it logs or carriages.
I actually don't feel too comfortable in kitchens, lol, and I know only how to make very simple foods. This one is very simple - boil potatoes. Well, everyone knows how to boil potatoes. While they are boiling, chop an onion and clean+chop in medium sized pieces fresh, clean chanterelles. Melt some butter in the frying pan, fry the onion until the pieces are golden, then add chanterelles with salt and black pepper by taste. Fry until ready, and voila - the best meal to have in the chanterelle season is done! :)
That's the only type of load I've ever hauled Snickers in. Maybe Lizzy will feel more comfortable if you stand there with her for a moment before leaving? Maybe leave there a piece of clothing she will recognize by smell and maybe associate it with you being near?