Just get a single sunpass. Setup an account for autopay. Register your camper tag on the account. Drive on...
We drive all our vehicles and trailers through the sunpass lanes, with or without a sunpass. Once in a while, they send us an toll violation notice. We just go on the account, enter the ticket number and move on. No worries because they just assign the toll amount and no extra fees. Happy driving.
edit: "sunpass" not "surpass" LOL