Fishing an inflated crawler (especially just the tail end) can be an effective and deadly method of fishing. Although, I cannot (currently) attest to its effectiveness (since I am not catching many fish, nor am I currently using an inflated crawler). But, back in the 70's I used inflated crawlers almost exclusively. And, caught and lost a bunch of fish, mainly bass and catfish in the lake that I fished.
IMO, the key to success in using the inflated crawler or any bait for that matter is to first fish it around good structure. Secondly, use light to ultra light gear for inflated crawler fishing. Since, you want to present that crawler as naturally as possible, with a minimum amount of weight and/or terminal tackle. I prefer 7 to 10 1/2 foot spinning rods that handle 4 to 8 pound line and up to about 3/8 ounce of weight. The rod needs to be a bit on the "whippy" side to protect your light line but with a touch of backbone to (hopefully) move the fish away from heavy cover. The hooks I use/used were either Mustad or Eagle Claw aberdeen, a light wire hook, from sizes 6 to 10, with a size 8 being my most standard hook.
I usually fished a Carolina type terminal rig, leader between 12 and 18 inches, using the smallest swivel I could find and a slip sinker of some sort, weighing between 1/16 and 1/8 ounce and maybe up to 1/4 ounce, depending on the depth of the water I was fishing. Although, at times, I used no weight at all.
I must emphasize not to use heavy catfishing gear for this method. On a fluke, you might catch one. But, day in day out, this method is for light line fishing. You will lose some fish but you got to get them on before you can lose them. And, this method proved to me, time and time again that it works and works well.
One other thing, don't use crawlers that are not lively. Keep your crawlers cool and in good condition and they will provide you with a lot of fun.