Hi Dug & Carol,
We used the following earlier this year and were very happy with them.
Venice : Camping Village Miramares, Punta Sabbioni Tel : 39 (0)41 530 1150 info@camping-miramre.it
This is a 10 minute walk from the Ferry where you can get to all over the Lagoon. Suggest you look at buying a multi day ticket and visit Burano & Murano islands, beside of course St Marks Square, it lets you on all the ferrys, including Grand Canal. This is a small well appointed site and recommended.
Camping Bella Italia in Peschiera Del Garda 39 (0) 45 6400688 camping-bellaitalia.it
This is a very large site with many excellent facilities, smallish pitches but on the lake. Suggest you use the buses to go to Verona and Sirmione, rather than the car, bus stop just outside gate, buy tickets in site..
Camping Covello on Lake Iseo, small site but the most welcoming we have ever been in, the lake is beautiful, about 1 km from centre. 39 (0) 30 9821 305 info@campingcovello.it
Camping Conca D'Oro, Baveno - Lake Maggiorie 39 (0) 3232 8538 info@concadoro.it
Good site on the lake near to small village and Baveno & Stressa.
Regarding Lake Como our site was not too good, so avoid Camping Rivabell in Lecco.
Trust this helps, enjoy the area is beautiful.
George