Thanks for all the replies. I called our agent yesterday and found out a couple of things:
1) Our carrier (National Interstate) has no provision for suspending coverage while in storage.
2) If we use the coach more than 157(?) days a year we are required to go to full timer coverage. That was a surprise since we spent 5 months traveling this summer.....worked out to 155 days or so.
Our comprehensive coverage is over 50% of the premium but I can raise the deductible to $2500 while in storage and she is figuring the $$$ benefit in doing so. She is also looking at another company just for comparison. So we shall see what we shall see.