You can choose lake pichola hotel for you stay in udaipur. Its build on lake pichola and offers good view. It restaurant is famous for lal mass and has stunning view.
Check out Bhandardara, dist. Ahmednagar. It's an amazingly beautiful place. There's mountains all around. Bhandardara is situated in the midst of Sahyadri range. You must visit this place once at least. Check out The Land Of Wanderlust (TLOW) website..... https://thelandofwanderlust.com/
Really you are going to travel in best part of India, If you are travelling solo on Bike. Do stay in home stays, better to taste local delicacies from very soft hearten and nice peoples there. With families you can stay in homestays and local cottages.
Yes. you can have a road trip to Manali.
Delhi to shimla
Explore shimla and reach Narkanda
Narkanda to Jibhi via Jalori Pass ( tirthan valley) and reach Manali In manali you have tons of things
( Beautiful old houses and culture in old Manali, Solang Valley, Sethan with igloo House , kothi village, sissu via Atal Tunnel and Amazing landscape of Lahaul and Spiti )
Avoid. Himachal as for now. Because of the Glacier outburst. Kashmir is a genuine option for your trip to choose between the two. You can also find various beautiful hilly areas / places in Jammu as well. Try going to Bhaderwah (The Land of Snakes) .You google about the history behind this name. This falls in Jammu region.
Gangtok, Tsomgo Lake, Nathula Pass, Kanchenjunga Base Camp, Lachen, Lachung and Yumthang Valley, Pelling, Zuluk, Teesta River, Gurudongmar Lake, Goechala