A paddling day costs fluid from three directions: the sun reflects off the surface onto the face and arms, the grip and core do steady isometric work for hours, and the dry suit or spray skirt keeps splash off but heat in. The access problem is the real one — a water bottle lashed behind the seat takes effort to reach, so nobody reaches for it. The measured rule is the deck rig: a bottle within arm's reach, a drink at every eddy or shoreline pause, and a per-hour target set before launch. The put-in and take-out are the two reliable water stations; the middle hours run on what the deck carries.
| Food | Oxalate (mg) | Serving | Rating |
|---|---|---|---|
| Water, still | 0 mg | 1 bottle | Safe |
| Trail mix (nuts & seeds) | 120 mg | 1/4 cup | Avoid |
| Beef jerky | 0 mg | 1 oz | Safe |
| Banana | 6 mg | 1 medium | Safe |
| Peanut butter sandwich | 10 mg | 1 half | Caution |
The paddler's dry bag usually carries trail mix and jerky: the jerky measures zero oxalate (the sodium is its watch point), while trail mix runs around 120 mg per serving — Avoid range, and easy to graze through on a long flat stretch. The measured swap is the banana at 6 mg and a halved sandwich at 10 mg, both bag-friendly and stone-aware. Water stays the base; the dry bag carries fuel, not the afternoon's oxalate budget.
Three habits cover most of the upside. Rig the bottle before launch — deck-mounted or under the bungees in front, because a bottle behind the seat is a bottle nobody opens. Drink on the pauses: every eddy, shoreline break, or photo stop is the hydration cue, since paddling itself has no natural break. And pack fruit and a sandwich over the nut bag — the dry-bag snacks that sit low on oxalate keep the day's ledger quiet while the arms do the work.
See how oxalate values are measured and verified on our data methodology page.