Changing wheels on a 2006 23 foot Safari

OK, have read this entire thread at least twice hoping to come across info to upgrade the wheels/tires on the 2006 23 foot Safari (double axels). Based upon what has been publish so far, I have discerned that all AS's with double axels, no matter it's over all length, have the same wheel well dimensions. Also that 14, 15, and 16 inch rims (with zero off-set) will bolt up to the axels with no clearance issues. Now I have stock 14 inch rims with 215/75-R14 Towmax tires and would like to upgrade to 15 or 16 inch rims, but notice that going to a 16 inch rims maybe out of the question due to have a 5 lug bolt pattern. I find that the Michelin LTX M/S would be fine for me, but also find that going to a 16 inch rim, I would have to go to a 235/75-R15 (16). So is there a 16 inch replacement rim for 5 lug hub and will there be clearance issues going to a 235 tire. Looking for input to my question so I can get the change over done before I hit the road for a couple long distance trip later this year. Thanks in advance for your assistance.