Great Idea on the water and fatigue... I'm about to start loading a training pack and this struck me as genius.I use a sand bag in the bottom and flat sided 1 gl. water jugs on up from there , if i really run out of gas I can dump some water .
I live by the beach and used to do the same thing. I would just fill up gallon ziplocks with beach sand and add them as I wanted. Cheap and easy and no hard edges to wear anything. This reminds me that I should really be doing that again, thanks…Since you're gonna buy a hunting pack, you could make some cheap sand bags with cheapo dry bags off amazon and pavers sand from home depot. Or just get some big sand bags from home depot and put them in a trashbag and wrap it with a bunch of duct tape. Its what i did. Way better than metal weights IMO and you'll wanna be sure you can pack heavy loads with your hunting pack anyway
Edit: if you're asking how much weight to put in it i dont think you need to do more than 30-50 depending on your fitness level to start out and you can go up from there if you want to
For a lot of years, I just used an old Kelty external frame with a pair of steel weights strapped to it. Worked fine. That frame fit me like a glove. I don't like internal frame packs for loads above 40-ish pounds.I'm looking to start training with a weighted pack, mainly climbing stairs and hills. I think ~55lbs is enough to make the ascent difficult but not wear out my knees on the downhill.
What has worked well for other people (realizing that not everyone has the same body type)?
wise advice there.I'm definitely in the camp of not training with a 100 lbs because you think may be hauling out 100 lbs.
I backpack year round so that constitutes the majority of my weighted carry.
But about 8 weeks out from hunting season I make it a point to get out with weighted pack twice a week (still hiking 2-3 days a week w/o a pack). I start with 30-ish lbs for two weeks, 40-ish lbs for two weeks, 50-ish lbs for two weeks and 60-ish for the final two weeks. Again only two days/week- usually one day is 3-5 miles, the other shorter but steeper.
I've never felt under trained hauling out loads during hunting season, even with loads in the 100 lb range.