If you enjoy a challenge, go for it, if they are not concerned with the building so much the better as it gives you more lee-way. IHMO; feral bees are alot stronger than package bees, they have to be to survive.
I'd start by trying to find the boundaries of the comb-might take some probing and drilling=then work from the outer edges to wards the center, keeping in mind that the brood and queen are most likely in the center.
The tools you'll need are, NUMBER 1 a bee vac and extension cords, a bee brush,knives (long slender type, ie,bread or fillet), putty knives (for scraping), a drill, a jig saw and/or circular (for cutting thru the wall along the studs), frames, rubber bands, a hive body, buckets, smoker, a spray bottle with 2:1 sugar water.
Smoke the opening of the hive and listen for the buzz it will give a good idea of where the main body is, you can also feel the wall with your hand, you'll notice a difference in temp as you near the center of the hive (if your lucky).
Depending on the time of the year I may or may not 'feed the robbed honey back to the captured hive, if the flow is slow I'll feed some back, if their is a dearth I feed 3/4 back and keep a small amount for me.
You never know what you'll get into with extractions, each one is different. With common sense, logic and a general understanding of bees you should do well.
Deficiently watch for the queen and if you have a queen cage or something you can use as one catch her if you can and keep her with the frames until you get them where you want them also leave as many bees on the frames as you can, I use a queen 'includer' (excluder) in between the hive bottom and bottom board after releasing her for a couple of days, just until she starts laying in her new surroundings, I've had them abscond even with brood in the box.
The above is a general guide line of the process accessing and observation is your allie
\"ONLY WHEN THE LAST RIVER HAS BEEN DRIED UP<br />THE LAST TREE BEEN CUT DOWN<br />THE LAST WILD FISH CAUGHT<br />WILL MAN REALIZE YOU CAN\'T EAT MONEY\"<br />GHANDI (?)