And depending upon the interior material of the rental vehicle again, look to velcro to secure the PVC carrier, or alternatively, you can never go wrong using 2 cinder blocks to secure the carrier. And then you've got two seats or rod holders with them there cinder blocks as well.
I figured with the weight of the luggage on the shelf (above the tackle) it would hold down the carrier, but you're right that it could still lift in unfortunate situations! Side to side and front to back it will be wedged in pretty tight. but I can also use what's being packed as some weight on it. As far as the cinder blocks, great (universal) idea but just don't have the room for them!
You taking a 5 gallon bucket? You should. And invest in one of these: http://www.amazon.com/Bucket-Portable-Toilet-Standard-Gallon/dp/B004KLY5CE A nice toilet seat to pop on the bucket. 5 Gallon bucket is on my list as well as a bait bucket, but never thought of a toilet lid for the bucket! Interesting!
What else? Dental floss, signal mirror, solid first aid kit with blood clotting agent (I once had a fairly significant hook removal event and the clotting agent was beneficial - http://www.amazon.com/Adventure-Medical-Kits-QuickClot-Silver/dp/B001BCMLWQ/ ), antibacterial soap for all those wonderful fish y'all will be removing from your hooks. Dental floss and first aid kit - CHECK But never thought of a signal mirror or a clotting agent! Great idea!
As far as removing hooks, I found this on Youtube! Probably not for the sqeemish! And personally I think the guy's nuts! https://youtu.be/zgfpsupmu98
Depending on bodies of water and surrounding land you may consider a snake hook. http://tongs.com/p_snakehooks.aspx Multi-purpose they are and consider the 45" hook. I've certainly thought about snakes for where we'll be and we'll likely be camping some nights so that's another great idea!
Depending on the states you're traveling through a firearm may not be on your to bring list, but you should consider some level of protection and deterrent. If you're unable to carry a firearm consider bear spray.
http://www.bearspray.com/ Quite powerful. I've had it halt a charging black bear and more than one "neighborhood dog". Invest in the bear spray, not the personal pepper spray. The bear spray has a higher volume of spray, is stronger than personal pepper spray, and shoots a further distance than personal pepper spray. We talked about a firearm but decided against it, but using bear spray instead of pepper spray? Wow! I doubt I could find that here in Nebraska but I would imagine as I travel through TN and into GA I may have better luck. Ordering anything now might be a stretch!
