For heavy use for main camp with vehicle, car, canoe, boat, air plane, aerospace ftl craft, I use the SP-53 for the main whopper and chopper, yes an axe is used also since one can pack things in.
Non vehicle outings the SP-51 as the straight blade is easier to do, this is for main heavy stuff.
Others that do other things like the RD-9, BK-9, for medium to heavy stuff multi-tools, the CS Maurder is used for light to medium, I find its nice curved Aus8A blade is great for fish!
Host of middling knives and such as for heavy the RD line 6, 7, Tanto, and soon a NS7. These are for HEAVY stuff to light duty, these have never failed me.
Rest middlings a mix from hunting knives to KA-BAR types.
I ALWAYS pack a buck 110 or gerber gator with a bigger knife for pairing.
Of course as some things never go according to plan I usually grab what will fulfill the need or closest to it. Like the SP-10 I got first for Look-ti-Cool turned to be a great all round literal beater blade and such. One thing I had to do was put my OKC Woodsman and Gerber BDZ-1 strongarm in the strictly hunting gear stuff, the non coated blades are what I prefer for game cutting down to literal sizing stuff. But then we all know what happens to a well thought out plan after it meets contact with reality.