Every two years there is the Découvertes en Vallée du Rhône. It’s a gigantic movable wine show. Each (major) village organises a tasting/show with the local producers. It starts in the north in Ampuis (Côte Rôte) on March 1 and ends in Pont du Gard (Côtes du Rhône) on March 6.
An excellent opportunity to get to know the Rhône producers better. But you have to make sure you have your own transportation so that you can get from one event to the next.
A suggestion: focus on the lesser (or less well-known) appellations. In the big & famous you are unlikely to make any new discovery but in the other once that are many exciting producers that are not so well known. Only for professionals. More details in September on www.decouvertes-vins-rhone.com