Well. Trying to hook him may not help too much. I did not see the part where you mentioned how large they are (may make a difference). Just pick him up and let him run thru your hands (hand over hand). His bite should not hurt too bad, it may draw a bit of blood and sting but you get used to it, promise). The temperature in the cage may be too warm. I've noticed snakes become more active (trying to get out) when the temps are too high. If he is roaming the sides of the cage or pushing in the corners you may need to give him more hides (try a hide up against the side of the cage so he finds it easier). Place him in a quiet area of the home where traffic is VERY limited, preferably in his own room or a reptile room. Does he have a basking light or heat pad. Heat pads are usually more efficient. You can control the temps of the cage with heat pads and offer a better gradient in temperature. Basking lights tend to heat half the cage hot and the other half warm (better suited for lizards or snakes that like it hot). Invest in a thermometer. Walmart has decent digital ones for $7-10.
I put a back on all of my aquariums and offer many hides. I like the hard molded food dishes (not sure what they are made out of exactly) that you find for $15 at petco or pet smart. If you can find one with a large footprint (bottom surface area) and place directly on the substrate. This offers a very good (cool) hide that your snake may utilize most. They will push thru the substrate (should be aspen, zoo med shredded aspen is a ) and hide there).
Sorry, not sure what you are really asking or experience so I started basic.
If he is flighty he may just need to be held more, if he is very active (normal and OK) then you can mess around. It's obvious if a snake is miserable in it's cage... But if that's not the issue frequent or infrequent your handling.
My snakes are mean as hell, but I like that, it keeps me from playing with them too much (let's them stay comfortable and keeps 'em doing snake stuff). When I pull 'em out after 2-4 minutes they are tame and enjoyable.... I just like to let them do their thing tho...
Anyhow, good luck and post pics if you can.
Clay