i hear about how much NBA players get for endorsing NIKE, but I never get the specifics about bass pros signing with new companies. Do they get free equipment, tourney entries paid, or just straight money?

According to Ike's book his sponsorship depends on how much they want to put in.  It varies with each type of sponsor and each fisherman

There is a major difference between having an endorsement opportunity and being sponsored. In either case the settlement and conditions clauses are usually kept private. Most often any disclosure that you see is a "stab in the dark" wild guess. Most sponsorship contracts forbid discussion of the deal.

Very few will ever get an endorsement opportunity, which in every case is a big money opportunity.