Complex sentence: The group, reveling in their success, greet an arriving Lazlo accompanied by Sherry Nugel, riding in a motor home pulling a trailer full of prizes from entering a sweepstakes earlier in the movie.
Split into simpler sentences: The group, reveling in their success, greet an arriving Lazlo accompanied by Sherry Nugel. Lazlo who has procured a motor home pulling a trailer full of prizes from entering a sweepstakes earlier in the movie.