Borrowing, or even renting, a trailer, versus buying ramps for rare usage appears an idea worth considering, IMHO. Nothing wrong with cinching the bike down with straps, versus a wheel chock.
As rick-dallas says, KLR650s may be heavier than they appear; thus, if you DO go for ramps, get the longest ones you can handle--might be a challenge for a short-bed. The longer the ramps, the shallower the slope loading, and thus the easier and safer the procedure.
A tri-fold ramp gives much more purchase for the people loading the bike (good to have a "spotter" when you can) than a single even a pair of one-track ramps. Also, you get tremendous advantage loading a bike, if you ELEVATE the ramp ends by placing them on a curb, a berm, or whatever is available--a loading dock can improve things a whole lot.
Now, one MANDATORY safety tip--if you use ramps of whatever design, USE SAFETY STRAPS/CABLES/CHAINS to fasten one end to the truck bed. If you ignore this tip, you invite costly and dangerous mishaps. Failure to secure the truck-end of ramps is a firing offense for employees of an ATV hold-down manufacturer I know of; a policy derived from experience.
All this said . . . what are the chances you'd be busted for riding without an endorsement? Isn't there a, "learner's permit" provision in your state's vehicle code? There is for motorcycle endorsements in my state; in fact, when applying for the motorcycle endorsement, the applicant MUST operate with a learner's permit for a minimum of 30 days (licensed rider must "supervise").
Common sense, care and thoroughness will get your bike home safely and in good condition, whatever transport mode you choose.