You could have a problem with the tea candles, at least in many areas, perhaps not so much in Canada. When they get hot, the wax will liquify and run, playing all kinds of games with the rest of the gear. Living in Arizona and California this was a very significant problem. Even in cooler climes, when you factor in the heat generated in a car interior, you could get runny wax.

Also from the perspective of hot deserts, one water bottle is typically insufficient, at least during the hotter months. You would typically carry three times or so the amount in your metal bottle. This is just an example of how rigs like this must be fine tuned to individual circumstances.