I have a slightly different take on it:
As a newly married couple I knew the thing we wanted and needed the most of all from wedding guests were their good wishes and blessings most of all.after all one out of every two weddings in the U.S appears to end in divorce.
All it took was my overhearing one too many conversations at the salon or coffee shop that went somewhat like this " I have to go to another wedding this weekend and I don't even know the couple so well. But the groom was my husband's college roommate and he insists on going. And the gift set us back almost $50". That was it. It wasn't happening. Not to say that people did not try to force a few checks on us (destroyed later by us).
I can tell you that our guests had a wicked good time at our two day nuptials: henna and music on day one and ceremony and reception on day two. We splurged on DJ, photographer, top shelf open bar both days and amazing food. My parents threw an impromptu brunch even the next morning for departing guests But showing our guests a fab time was a priority for me. I will say that no guest registry and a fab experience for wedding guests were my requirements not necessarily my hubby's but he went along with it. When his younger brother got married the next year they did have a gift registry.
But it was not as much as having guilt about asking for gifts as it was about not wanting anyone to have to stress about $$. We did receive some presents at our first anniversary or people took us to dinner later in the year. We did keep our wedding small :220 people which is minuscule by the usual 500-750 invitees at many Indian American weddings.
I am sorry that I got off on a tangent and rambled on. Back to the point at hand....
I would suggest that try and keep your minimum price point for gifts quite low. This should help.