You may be able to both tow an ATV trailer and simultaneously use a motorcycle carrier in a hitch adapter like the Curt # D-192 but you will want to confirm the weight capacities of your Navion and the hitch installed on it. Check the RV owner's manual and also the safety sticker on your hitch to confirm weight ratings. Both the RV and the hitch on it must be rated for the combined weight of the Trail 90, the carrier you use to transport it and the actual tongue weight of the loaded utility... view full answer...