I take mine to a local test only center. It makes me feel better to know that they only are allowed to do smog tests, but are not allowed to do repairs.
Some of the larger RV repair centers and dealers do smog tests, but generally charge more to do it.
Check the Yellow Pages for smog test only centers and ask how much. Most stations will offer a discount if you remove and reinstall the dog house for them.
I think I paid about $68.00 last year.
'98 Gulf Stream Sunsport 325, 7.5L Banks Power Pack, Koni FSD's, Air Bags, ReadyBrute Elite,
2000 Honda Accord