I agree with GWH. Instead of dropping so much money on topo maps from there, search around for some good BLM or Forest service maps.
I got a nice, spiral bound book of topo maps of our local national forest for something like $10. If I had gone with the simple fold up map, it would have only been $3.95 or so. Great detail in the maps, and since they are put out by the agencies themselves, you never need to worry about accuracy for the most part.
As I sit and glass, which is common for hunters out west, I have sort of quickly discovered something I never learned when I was younger.
In my youth I had enthusiasm and spirit. In my middle to advancing years I have creaky knees, arthritis, and I tire more easily than I used to. Where I used to sit on the cold hard ground I now look for that soft spot to sooth my tired muscles. That leads me to my tip.
Carry your soft spot with you!
In my pack I carry an air filled, ultralight, camping pad....