I’d say go big...

Check this one out-

http://www.norcalkayakanglers.com/index.php?topic=86419.0;topicseen

Check with Naoaki he might know someone.

Lake Tahoe EIP
https://tahoeboatinspections.com//tahoe-keepers/

https://tahoeboatinspections.com/tahoe-keepers/about-tahoe-keepers/

FAQ
https://tahoeboatinspections.com/frequently-asked-questions/

Kelp in the drift gives on helluva fight and ride. Lol 

It could of been a nice size Ling.

More Unveiled about Old Town®’s Exciting New Fishing Kayak Series!

Old Town provides kayak anglers with large fishing kayak performance in a compact, nimble format—plus award-winning PDL Drive version!
 
Old Town, Maine (June 21, 2018) - Adding to their extensive and impressive portfolio of fishing kayaks, you have been teased for weeks with the all-new, soon-to-be-released Topwater Series of kayaks from Old Town, slated to make its debut at ICAST in July. Speculations have been swirling on what “Series” means—well, we are happy to announce that not only will the Topwater come in two lightweight, compact paddle versions, the Topwater will also be available in a lightweight, hands-free and nimble pedal-powered version, featuring the award-winning PDL Drive!

Fishing kayak design experts Old Town are proud to cater to market demand, bringing kayak anglers exactly what they’ve been looking for, namely boats that provide a great on the water fishing experience, comfort, easy transportation/storage, and loads of value. The Topwater Series also offers impressive stability and a fantastic set of advanced features.

Stay tuned to www.oldtowncanoe.com for more information to be released soon!
 
Topwater PDL specifications

Length: 10’ 6”
Width: 36"
Weight: 76 lbs. (under 100 lbs. w/PDL Drive)
Bow Hatch: 16.5” x 10”
Leg Length: 46”
Capacity: 450 lbs.
MSRP: $1999.99
 
Like other Old Town fishing kayak models, the Topwater is infinitely customizable with rigging accessories from Cannon®, Scotty™, Railblaza®, YakAttack®, RAM®, and more. Launching at ICAST 2018 On the Water (July 10) and ICAST booth #622 on July 11, the Topwater Series will begin shipping to dealers in July 2018.

I pack all my electrical connections with a heavy dose of dielectric grease and reapply frequently.

Clean it with some electrical connection spray, emery cloth or 1000/1500 grit sand paper and pack both sides of the connection with some dielectric grease.

Also something to keep in mind besides the fish finder is the VHF battery connections and any antenna/mic ports or the FF battery connections.

https://www.dakotalithiumbattery.com/12-v-10-ah-lithium-battery

It's the same size as the 7ah bricks.