This hydrocut has recently been cleared (2016) but is really wet in spots. Caches are best done after freeze up in winter. Although hunting isn't allowed it happens so Jan/February are the best times unless you have an ATV which means anytime is good.
The area is ripe with ATV trails but some are marked Private Property and although I have my doubts its best to just stick to the open space and only go up the banks to bipass the bigger puddles.
You are looking for a bison tube with a logsheet inside. BYOP