Two rifle carry?

I have been looking at back packs for day hunting. Or hunting for a day away from a base camp. My concern is that I might be in country with unfriendlies. My preferred hunting rifles are a Savage .308 (modified Scout) or now perhaps a Kimber Hunter 6.5CM replacing a Ruger M77 .270. Both are excellent and durable hunting rifles but they are not up to STOPPING of said unfriendlies. For that I would prefer to have my Marlin 45-70 SBL GG with Buffalo Bore +P+. I would want one of those scabbard type packs that keep the hunting rifle bore down for easy access and draw. But is there a suspension system that would carry some of the weight of my Marlin on the side or front and allow fast access? I saw something from Eberlstock but now cannot find it? I would wish to have my hands free for a hiking cane and other purposes.

I suppose I could just purchase yet another rifle in .338 Win Mag, controlled feed bolt or a BAR/BLR type rifle. But I would still need immediate access to it and I am not quite sure it would cuddle with me or comfort me quite like the Marlin 45-70 does. And, perhaps I am wrong, but a .338 Win. Mag is overkill for most game animals in North America.

I found the system I was thinking of:

https://store.kifaru.net/gun-bearers-p30.aspx

And then coupled with something along this line:

https://eberlestock.com/collections/hunting-packs/products/gunrunner-pack?variant=16875758878771

Now, the practicality of it, do not know. This phobia stems from a run in with a bear that followed me (hunted me) while solo hiking (not hunting and no gun) some years back. Nowadays I like this in the tube:

https://www.garrettcartridges.com/4570540defendertech.html

Followed by these:

https://www.buffalobore.com/index.php?l=product_detail&p=546

Or these:

https://www.buffalobore.com/index.php?l=product_detail&p=150

I am 66 yo, 5-10, 160 pounds, still compete in triathlon, but still, I am 66 yo and altitude and steep mountains are a certain consideration for sure. Perhaps I really just need to get a Ruger Hawkeye or scout the gun shows for a used Mark II Model 77 in the .338 or similar---? I could still have the Marlin at base camp to sleep with, lol .

For general carry and hunting with the Marlin I like the HSM 45-70 430 grain hard cast bear load. It is only 3,098ft/lbs, a good bit milder than the Garret and BB stuff and less expensive and easier to shoot and follow up. I have used it for deer and big pigs. They do not get up:

https://hsmammunition.com/bear-load/

But the Marlin is only a 200 yard rifle. Oh well, need to start saving money for a new rifle, bummer.