This is mainly what I was looking for. If I'm approaching from the west I certainly don't want to fly out to SBJ to execute the approach and was just curious what was legal in terms of using the other IAF.
As others said, you could be cleared direct to GROOM if you are /G. But since you are coming back, let's try a broader view that you can bring to your next random approach. I am assuming no vectors to the final approach course,
There are tw basic requirements for doing anything under IFR in controlled airspace: (1) an ATC instruction to do it; (2) the approved equipment than enables you to navigate it.
In the normal course of events (i.e., not an emergency), at a nontowered destination, unless there are significant traffic issues, ATC will expect you to tell them which approach you prefer and how you choose to get there.
For KDYL, I actually have three choices. SBJ VOR, GROOM (the IAF) and FLING (the IF*). All SBJ requires is an VOR receiver. The other two require equipment that will permit you to navigate directly to a point in space. For most of us that means GPS. Also, GROOM has a mandatory HILO if I use it as the IAF*.
So, applying both requirements, I ask for the one that makes the most sense to me based on my direction of flight toward KDYL.
That's the "legal."
(*since it's has been a while, you may be unfamiliar with IFs (Initial Fixes), so read up on them in the AIM, or better yet, the FAA's Instrument Procedures Handbook. You will also want to read up on when it might be permissible to go direct to an FAA and avoid the procedure turn since it has undergone a number of changes in the past few years)